{"id":2507,"date":"2026-06-08T11:43:56","date_gmt":"2026-06-08T11:43:56","guid":{"rendered":"https:\/\/photronled.com\/?p=2507"},"modified":"2026-06-08T11:56:27","modified_gmt":"2026-06-08T11:56:27","slug":"what-is-the-difference-660-vs-850-red-light-therapy","status":"publish","type":"post","link":"https:\/\/photronled.com\/ko\/what-is-the-difference-660-vs-850-red-light-therapy\/","title":{"rendered":"660nm\uc640 850nm \uc801\uc0c9\uad11 \uce58\ub8cc\uc758 \ucc28\uc774\uc810\uc740 \ubb34\uc5c7\uc778\uac00\uc694?"},"content":{"rendered":"\t\t
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The fundamental difference between 660nm and 850nm red light therapy lies in their electromagnetic wavelengths, which directly dictate their tissue penetration depth, cellular chromophore absorption rates, and primary therapeutic objectives. Specifically, the 660nm wavelength falls within the visible red spectrum and penetrates shallowly (approximately 8 to 10 millimeters), making it optimized for superficial dermatological concerns, epidermal rejuvenation, and accelerated wound healing by stimulating collagen production within the dermal layers. Conversely, the 850nm wavelength exists in the invisible near-infrared (NIR) spectrum and possesses a significantly greater depth of penetration (reaching up to 30 to 50 millimeters), allowing it to bypass the cutaneous layers entirely to target deep-seated musculoskeletal structures, reduce deep tissue inflammation, accelerate athletic recovery, and alleviate chronic joint pain.<\/p>

For B-end customers, commercial buyers, and product developers managing high-power LED red light therapy panels, choosing the precise configuration of these wavelengths is the cornerstone of clinical efficacy and product differentiation. Photobiomodulation (PBM) relies on delivering precise optical energy densities to target cellular receptors. While both wavelengths stimulate cellular energy production via the mitochondrial respiratory chain, their physical propagation through human tissue produces entirely distinct physiological outcomes.<\/p>

Understanding these nuances enables distributors, wellness center operators, and medical equipment procurement officers to curate product lines tailored to specific market demands. Whether your target demographic is an elite sports rehabilitation facility requiring deep structural repair, or a high-end medical spa focusing on non-invasive anti-aging interventions, a precise mastery of the 660nm versus 850nm dichotomy is essential for driving commercial success and maximizing client outcomes.<\/p>

\u00a0<\/span>1. What Are the Scientific Mechanisms and Superficial Benefits of 660nm Red Light Therapy?<\/h2>

The 660nm wavelength operates within the visible red light band of the electromagnetic spectrum. At this specific frequency, photons possess an ideal balance of photon energy and tissue absorption dynamics, making them highly reactive with the chromophores located in the outermost layers of the human body. When high-power LED arrays emit 660nm light, the energy is absorbed predominantly within the epidermis and dermis, rarely extending beyond the subcutaneous fat layer.<\/p>

The Biochemical Cascade of Visible Red Light<\/h3>

The primary mechanism of action for the 660nm wavelength centers on its interaction with cytochrome c oxidase (CCO)<\/strong>, the terminal enzyme (Complex IV) of the mitochondrial electron transport chain. During periods of cellular stress, aging, or inflammation, nitric oxide (NO) binds to cytochrome c oxidase, displacing oxygen and effectively inhibiting the cell’s ability to produce energy.<\/p>

When photons at 660nm strike the CCO enzyme, they cause the photodissociation of nitric oxide. This allows oxygen to bind to the enzyme once more, turning on the electron transport chain and accelerating the synthesis of Adenosine Triphosphate (ATP)<\/strong>. This surge in cellular energy acts as fuel for localized cellular repair, proliferation, and rejuvenation.<\/p>

[660nm\/850nm Photons] ---> Hits Cytochrome C Oxidase (CCO) \n                          ---> Photodissociation of Nitric Oxide (NO)\n                          ---> Oxygen Binds to CCO\n                          ---> Accelerated Electron Transport Chain\n                          ---> Surge in Adenosine Triphosphate (ATP) Synthesis\n                          ---> Cellular Repair & Proliferation<\/code><\/pre>
Key Dermatological and Superficial Advantages<\/h3>
Because its energy is concentrated within the top 10 millimeters of tissue, the 660nm wavelength delivers remarkable outcomes for superficial skin treatments:<\/p>
  • Upregulation of Collagen and Elastin Biosynthesis:<\/strong> The 660nm light waves stimulate dermal fibroblasts\u2014the specialized cells responsible for generating the structural matrix of the skin. By upregulating the expression of collagen-related genes, this wavelength effectively fills in fine lines, mitigates deep wrinkles, and restores structural elasticity to aging skin.<\/li>
  • Correction of Hyperpigmentation and Vascular Irregularities:<\/strong> This wavelength enhances microcirculation within the capillary beds of the skin. Improved blood flow accelerates cellular turnover and assists in the clearance of metabolic waste, resulting in a more balanced skin tone, reduced redness, and minimized dullness.<\/li>
  • Modulation of Inflammatory Acne Vulgaris:<\/strong> While blue light is typically utilized for its antibacterial properties against Cutibacterium acnes<\/em>, 660nm red light plays a critical role by downregulating inflammatory cytokines and regulating sebaceous gland hyperactivity. This significantly reduces the swelling, erythema, and scarring associated with severe acne breakouts.<\/li>
  • Rapid Epithelialization of Superficial Wounds:<\/strong> For minor burns, surgical incisions, abrasions, and micro-needling recovery, 660nm light accelerates the migration of epithelial cells to the wound site, fostering rapid tissue closure and reducing the formation of hyperplastic scar tissue.<\/li><\/ul>
    Ideal Commercial Use Cases<\/h3>
    This spectrum is the ideal choice for businesses operating within the aesthetic, dermatological, and premium consumer wellness spaces. Beauty salons, medical spas, and anti-aging clinics use 660nm-heavy LED panels to offer non-invasive facial rejuvenation treatments that serve as effective alternatives or complements to chemical peels, microdermabrasion, and ablative laser therapies.<\/p>
    2. Why Does 850nm Near-Infrared Light Penetrate Deeper for Muscle and Joint Recovery?<\/h2>
    Moving past the visible boundaries of human sight, the 850nm wavelength enters the near-infrared (NIR) spectrum. At this point on the electromagnetic spectrum, the physics of light propagation through biological tissue shift dramatically. The human body displays what photobiologists refer to as the “optical window” or “therapeutic window”<\/strong>, spanning roughly from 600nm to 1100nm. Within this window, light absorption by common tissue pigments\u2014such as water, melanin, and hemoglobin\u2014drops significantly, allowing photons to travel deep into tissue rather than being absorbed at the surface.<\/p>
    The Physics of Deep Structural Tissue Penetration<\/h3>
    At 850nm, the scattering of photons is lower than at shorter wavelengths, allowing the light to pass deep through the skin, fat, and fascia. It can reach depths of 3 to 5 centimeters, allowing it to interact directly with internal targets:<\/p>
    • Skeletal muscle groups<\/li>
    • Tendons and ligaments<\/li>
    • Synovial joints<\/li>
    • Deep-seated vascular pathways<\/li>
    • Peripheral nerve bundles<\/li><\/ul>
      While 850nm light still interacts with cytochrome c oxidase in the mitochondria to boost ATP production, its deep reach triggers broader, systemic responses. It modulates retrograde signaling pathways that affect gene expression, protein synthesis, and cellular homeostasis across entire muscle groups and skeletal structures.<\/p>
      Major Therapeutic Impacts of the 850nm Spectrum<\/h3>
      The deep reach of 850nm light delivers unique benefits for structural repair and pain management:<\/p>
      • Acceleration of Deep Myofibrillar Repair:<\/strong> Intense physical exertion causes micro-tears in muscle fibers, leading to Delayed Onset Muscle Soreness (DOMS). Exposure to 850nm near-infrared light stimulates satellite cell proliferation and upregulates myofiber protein synthesis. This speeds up muscle recovery, reduces downtime between workouts, and boosts athletic performance.<\/li>
      • Alleviation of Chronic Articular Inflammation:<\/strong> For conditions like osteoarthritis and rheumatoid arthritis, 850nm light targets the joint capsule directly. It suppresses pro-inflammatory cytokines such as Tumor Necrosis Factor-alpha (TNF-\u03b1) and Interleukin-1 beta (IL-1\u03b2), while promoting an anti-inflammatory environment. This reduces joint stiffness, relieves pain, and improves mobility.<\/li>
      • Systemic Vasodilation and Nitric Oxide Release:<\/strong> The release of nitric oxide into deeper blood vessels induces rapid vasodilation. This relaxes smooth muscle walls within blood vessels, increasing local blood circulation. The result is improved delivery of oxygen and vital nutrients to damaged tissues, along with faster clearance of inflammatory markers like lactic acid.<\/li>
      • Mitigation of Deep Neuropathic and Somatic Pain:<\/strong> Near-infrared light dampens the conduction velocity of peripheral pain fibers (C-fibers and A-delta fibers), providing a natural analgesic effect. It also stimulates the release of endogenous endorphins, offering lasting pain relief without the systemic risks of pharmaceutical painkillers.<\/li><\/ul>
        Ideal Commercial Use Cases<\/h3>
        The 850nm wavelength is highly valued by physical therapy centers, sports science clinics, orthopedic rehabilitation facilities, and chiropractic practices. It provides a non-drug, non-invasive method for managing pain, treating sports injuries, and speeding up recovery from orthopedic surgeries.<\/p>
        3. How Do 660nm and 850nm Wavelengths Compare in Clinical Applications and Tissue Depth?<\/h2>
        To make informed product designs and inventory investments, commercial buyers must look closely at how 660nm and 850nm wavelengths differ across key physical and operational parameters. While both offer valuable therapeutic benefits, they are optimized for different depths and treatment goals.<\/p>
        Penetration Mechanics: Epidermal Absorption vs. Deep Spatial Scattering<\/h3>
        The primary differentiator between these two wavelengths is how they move through biological tissue.<\/p>
        The 660nm wavelength encounters high absorption from melanin in the epidermis and hemoglobin in the blood. This means its energy is quickly absorbed in the upper layers, making it highly effective for targeted treatments on the skin’s surface but leaving little energy for deeper structures.<\/p>
        The 850nm wavelength, by contrast, avoids these surface barriers. It travels easily through the skin envelope, allowing photons to scatter deeper into underlying tissues. This ensures that the energy reaches deep muscles and joints where it is needed most.<\/p>
        Target Chromophores and Biological Receptors<\/h3>
        Although both wavelengths target mitochondrial cytochrome c oxidase, their overall biological pathways differ due to where they are absorbed:<\/p>
        • 660nm Red Light:<\/strong> Focuses its energy on dermal fibroblasts, epidermal keratinocytes, and superficial melanocytes<\/strong>. Its primary goal is optimizing cellular functions within the skin matrix, boosting extracellular proteins, and repairing surface tissue.<\/li>
        • 850nm Near-Infrared Light:<\/strong> Delivers its energy to myocytes (muscle cells), chondrocytes (cartilage cells), osteoblasts (bone cells), and deep nerve cells<\/strong>. This initiates structural tissue repair, reduces joint inflammation, and provides deep pain relief.<\/li><\/ul>
          Dosing Dynamics and Session Multipliers<\/h3>
          Because 660nm light acts on the surface, skin cells respond quickly to relatively brief exposures. High-power panels can deliver an effective dose to the skin in a short amount of time.<\/p>
          In contrast, 850nm light loses energy through scattering as it travels deeper into the body. To deliver an effective dose to deep tissues like joints or muscles, the device must maintain a high irradiance (optical power density)<\/strong>, and sessions often need to be longer to ensure enough photons reach the deep target areas.<\/p>
          4. Where Should B2B Buyers Deploy Dual-Wavelength Systems for Maximum Commercial ROI?<\/h2>
          For B2B buyers\u2014including medical equipment distributors, wellness franchise owners, spa procurement managers, and private clinic operators\u2014purchasing decisions must align closely with market demand and client needs. While single-wavelength devices have their niche, professional operations achieve the best returns by choosing integrated, dual-wavelength systems that deliver both 660nm and 850nm light simultaneously.<\/p>
                            [Target Market Alignment]\n                             |\n         +-------------------+-------------------+\n         |                                       |\n[Aesthetic & Beauty Market]             [Medical & Rehab Market]\n         |                                       |\n * Dermal Clinics, High-End Spas         * Orthopedic Centers, Sports Teams\n * Primary Tool: 660nm Red Light         * Primary Tool: 850nm Near-Infrared\n * Secondary Tool: 850nm (Systemic)      * Secondary Tool: 660nm (Incisions)\n         |                                       |\n         +-------------------+-------------------+\n                             |\n              [Ultimate B2B Product Solution]\n               Dual-Wavelength Panels (660+850)\n               Configurable Array Switching<\/code><\/pre>
          The Aesthetic and Premium Beauty Market<\/h3>
          If your target market consists of dermatology clinics, high-end medical spas, and skincare studios, your primary focus will be on the 660nm wavelength. Clients in this space seek non-invasive solutions for skin tightening, wrinkle reduction, acne management, and evening out skin tone.<\/p>
          However, including 850nm light in these systems offers a distinct commercial advantage. Even during facial treatments, near-infrared light improves blood circulation and reduces systemic inflammation, which enhances the skin-rejuvenating effects of the 660nm red light. Offering a dual-wavelength option allows spas to market comprehensive, multi-layer skin rejuvenation treatments that command premium pricing.<\/p>
          The Medical, Rehabilitation, and Sports Performance Market<\/h3>
          For physical therapy clinics, chiropractic offices, sports recovery facilities, and professional athletic teams, the 850nm wavelength is the essential choice. These businesses require deep tissue penetration to treat acute muscle strains, chronic joint pain, tendon tears, and overall physical fatigue.<\/p>
          Incorporating the 660nm wavelength into these rehabilitation settings adds valuable versatility. For example, athletes recovering from orthopedic surgeries benefit from 850nm light to repair deep ligaments, while the 660nm light speeds up the healing of surgical incisions and reduces surface scar tissue. Dual-wavelength panels allow rehabilitation clinics to offer full-body recovery protocols, maximizing equipment utilization and client throughput.<\/p>
          The Home Wellness and E-Commerce Consumer Trends<\/h3>
          The consumer market for home wellness devices is growing rapidly. Savvy consumers look for professional-grade features in home equipment, and devices that offer both 660nm and 850nm wavelengths are highly sought after.<\/p>
          B2B distributors supplying e-commerce platforms or retail brands should focus on versatile, dual-wavelength panels. Devices that feature independent control switches\u2014allowing users to select pure 660nm red light, pure 850nm near-infrared light, or a combined spectrum\u2014provide excellent market flexibility, appeal to a wide range of consumers, and stand out in a competitive marketplace.<\/p>
          5. Who Benefits Most from Combining 660nm and 850nm Light Spectrum Devices?<\/h2>
          The highest level of photobiomodulation therapy is achieved through the intentional combination of 660nm red light and 850nm near-infrared light. Rather than choosing one over the other, combining these wavelengths produces a powerful synergy, delivering treatment across multiple layers of tissue simultaneously.<\/p>
          The Biological Power of Multi-Layered Treatment<\/h3>
          When 660nm and 850nm photons are delivered together, they treat the targeted area from the epidermis down to the deep musculoskeletal structures. This combined approach is highly effective for complex medical and aesthetic concerns that involve multiple tissue layers:<\/p>
          • Comprehensive Post-Surgical Recovery:<\/strong> Following a procedure like a total joint replacement or a deep cosmetic surgery, the body requires healing across various depths. The 660nm light works to repair the skin incision and prevent scar formation, while the 850nm light penetrates deeper to reduce inflammation in traumatized muscles, tendons, and bone structures.<\/li>
          • Advanced Sports Injury Rehabilitation:<\/strong> A severe injury like a sprained ankle or a torn muscle involves both superficial swelling and deep structural damage. Using both wavelengths allows clinics to treat surface bruising and inflammation with 660nm light, while simultaneously using 850nm light to accelerate cellular repair within the deep ligaments and muscle tissues.<\/li>
          • Holistic Anti-Aging Protocols:<\/strong> True skin aging affects more than just the surface epidermis; it involves the loss of density in the deeper dermal layers and a decline in microvascular support. Combining both wavelengths ensures that the superficial skin cells are stimulated to produce collagen, while the deeper near-infrared light enhances blood flow and nutrient delivery from the underlying capillary networks.<\/li><\/ul>
            Maximizing Efficiency for Wellness Operators<\/h3>
            For commercial wellness operators, dual-wavelength systems optimize treatment times. Clients can receive a full-spectrum treatment covering both superficial skin rejuvenation and deep muscle relaxation in a single, efficient session. This multi-benefit capability enhances client satisfaction, increases retention rates, and allows business owners to optimize their scheduling and maximize revenue per hour.<\/p>
            6. When Should Commercial Operators Adjust Irradiance, Session Duration, and Treatment Frequency?<\/h2>
            To deliver safe, effective red light therapy treatments, commercial operators must understand the core parameters of light dosing: irradiance<\/strong>, session duration<\/strong>, and treatment frequency<\/strong>. Photobiomodulation follows a principle known as the Arndt-Schulz Law<\/strong>, which states that there is an optimal dose window for light therapy. If the dose is too low, no benefit is achieved; if the dose is too high, the therapeutic benefit decreases or can even be reversed.<\/p>
                   [THE PHOTOBIOMODULATION DOSING CURVE]\n             (Arndt-Schulz Response Law)\n  Efficacy\n    ^\n    |               * * * [OPTIMAL DOSE WINDOW]\n    |             * * (Max ATP & Regeneration)\n    |           * *\n    |         * *\n    |       * *\n    +-----+-----------------------+------------> Total Energy\n          |                       |             Delivered (Joules)\n     [UNDER-DOSED]           [OVER-DOSED]\n   (Inadequate Energy)    (Inhibitory Phase\/No Benefit)<\/code><\/pre>
            Understanding Irradiance and the Inverse Square Law<\/h3>
            Irradiance, measured in milliwatts per square centimeter (mW\/cm2<\/sup>), represents the concentration of light energy delivered to the skin surface. High-power professional panels typically deliver irradiances between 100 mW\/cm2<\/sup> and 150 mW\/cm2<\/sup> at a distance of 6 inches.<\/p>
            Operators must account for the inverse square law of light: as the distance between the client and the LED panel increases, the light intensity drops significantly. For skin-focused 660nm treatments, positioning the client 12 to 18 inches away provides a lower, more evenly distributed irradiance over a larger area. For deep tissue 850nm treatments, placing the client closer (6 to 12 inches) ensures a high concentration of photons can penetrate deep into the body.<\/p>
            Calculating the Total Energy Dose (Fluence)<\/h3>
            The total energy delivered during a treatment session is measured as fluence, expressed in Joules per square centimeter (J\/cm2<\/sup>). Operators can calculate this using the following formula:<\/p>
            Fluence (J\/cm2<\/sup>) = [Irradiance (mW\/cm2<\/sup>) \u00d7 Time (seconds)] \/ 1000<\/strong><\/p>
            • For Superficial Skin Treatments (660nm):<\/strong> The optimal target dose is relatively low, typically ranging from 4 J\/cm2<\/sup> to 15 J\/cm2<\/sup>. Using a professional panel, this target is typically achieved in a brief session of 8 to 12 minutes<\/strong>.<\/li>
            • For Deep Musculoskeletal Treatments (850nm):<\/strong> Because light scatters as it travels deeper into tissue, a higher surface dose is required to achieve the desired effect inside muscles or joints. Target doses here range from 20 J\/cm2<\/sup> to 50 J\/cm2<\/sup>, which generally requires a session duration of 15 to 20 minutes<\/strong> close to the device.<\/li><\/ul>
              Designing Effective Clinical Protocols<\/h3>
              To ensure consistent results, operators should customize treatment frequencies based on the client’s specific goals:<\/p>
              • Acute Athletic Injury or Severe Pain:<\/strong> Daily sessions (5 to 7 times per week) are recommended during the first 1 to 2 weeks to manage intense inflammation and accelerate early tissue repair.<\/li>
              • Chronic Musculoskeletal Conditions (e.g., Osteoarthritis):<\/strong> A frequency of 3 to 4 times per week helps maintain reduced inflammation and long-term joint comfort.<\/li>
              • Aesthetic Skin Rejuvenation and Anti-Aging:<\/strong> Consistently scheduling 2 to 3 sessions per week provides the steady, ongoing stimulation needed for fibroblasts to build new collagen networks over a 6 to 12-week period.<\/li><\/ul>
                Frequently Asked Questions (FAQs)<\/span><\/p>
                What is the exact difference between the clinical outcomes of 660nm vs 850nm wavelengths?<\/h3>
                The primary difference is where the treatment takes effect in the body. The 660nm wavelength acts on the surface layers, making it highly effective for dermatological improvements such as reducing fine lines, evening skin tone, clearing acne, and healing surface wounds. The 850nm wavelength penetrates deep into underlying tissues, making it the preferred choice for reducing joint pain, accelerating muscle recovery, lowering deep-seated inflammation, and repairing tendons or ligaments. While both boost cellular energy, 660nm works on the skin, while 850nm works on deeper structural tissues.<\/p>
                Does a professional therapy panel need to offer simultaneous output of both 660nm and 850nm?<\/h3>
                While single-wavelength devices can be effective for specific treatments, a professional-grade panel that outputs both wavelengths simultaneously is highly recommended for commercial operators. This dual-wavelength capability allows you to treat multiple tissue layers at the same time\u2014such as healing surface skin while repairing deeper muscle tissue\u2014which broadens your range of available treatments. It also shortens overall session times, increases client throughput, and provides a higher return on investment for wellness clinics and commercial spas.<\/p>
                Are there any side effects or contraindications associated with professional-grade red light therapy?<\/h3>
                Red light therapy is a non-invasive, non-thermal, and completely drug-free treatment that has been proven safe across hundreds of clinical trials. It does not contain harmful ultraviolet (UV) radiation, so it carries no risk of skin damage or burning. Users often feel a gentle, relaxing warmth due to the increased blood circulation in the treated area.<\/p>
                However, standard clinical contraindications should be observed: avoid direct exposure over active malignant tumors, do not treat the abdomen during pregnancy, and use caution with clients taking known photosensitizing medications (such as Accutane or certain antibiotics). For eye safety, high-power professional panels require users to wear protective blackout goggles during sessions to prevent eye fatigue from the intense brightness.<\/p>
                Conclusion<\/h2>
                Navigating the choices in photobiomodulation can be complex, but mastering the specific roles of 660nm and 850nm wavelengths allows B2B buyers to make smart, data-driven decisions that elevate their business offerings. The 660nm wavelength remains a powerhouse for surface-level skincare and anti-aging treatments, while the 850nm wavelength is essential for deep structural tissue recovery and pain management.<\/p>
                By investing in high-quality, dual-wavelength systems that combine both spectrums, commercial operators can offer versatile, multi-layer treatments that meet a wide variety of client needs. Ensuring your equipment meets high manufacturing standards\u2014such as verified irradiance, low EMF levels, and zero flicker\u2014protects your investment and delivers safe, consistent results that keep your clients coming back.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"
                660nm\uc640 850nm \uc801\uc0c9\uad11 \uce58\ub8cc\uc758 \uadfc\ubcf8\uc801\uc778 \ucc28\uc774\uc810\uc740 \uc804\uc790\uae30\ud30c\uc7a5\uc5d0 \uc788\uc73c\uba70, \uc774\ub294 \uc870\uc9c1 \uce68\ud22c \uae4a\uc774, \uc138\ud3ec \ubc1c\uc0c9\ub2e8 \ud761\uc218\uc728 \ubc0f \uc8fc\uc694 \uce58\ub8cc \ubaa9\ud45c\ub97c \uc9c1\uc811\uc801\uc73c\ub85c \uacb0\uc815\ud569\ub2c8\ub2e4. \uad6c\uccb4\uc801\uc73c\ub85c, 660nm \ud30c\uc7a5\uc740 \uac00\uc2dc\uad11\uc120 \uc801\uc0c9 \uc2a4\ud399\ud2b8\ub7fc\uc5d0 \uc18d\ud558\uba70 \uce68\ud22c \uae4a\uc774\uac00 \uc595\uc2b5\ub2c8\ub2e4(\uc57d 8~10mm)., <\/p>","protected":false},"author":1,"featured_media":2509,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[94],"class_list":["post-2507","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-660-vs-850-red-light-therapy"],"_links":{"self":[{"href":"https:\/\/photronled.com\/ko\/wp-json\/wp\/v2\/posts\/2507","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/photronled.com\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/photronled.com\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/photronled.com\/ko\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/photronled.com\/ko\/wp-json\/wp\/v2\/comments?post=2507"}],"version-history":[{"count":5,"href":"https:\/\/photronled.com\/ko\/wp-json\/wp\/v2\/posts\/2507\/revisions"}],"predecessor-version":[{"id":2514,"href":"https:\/\/photronled.com\/ko\/wp-json\/wp\/v2\/posts\/2507\/revisions\/2514"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/photronled.com\/ko\/wp-json\/wp\/v2\/media\/2509"}],"wp:attachment":[{"href":"https:\/\/photronled.com\/ko\/wp-json\/wp\/v2\/media?parent=2507"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/photronled.com\/ko\/wp-json\/wp\/v2\/categories?post=2507"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/photronled.com\/ko\/wp-json\/wp\/v2\/tags?post=2507"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}