LED Phototherapy Device

Q1: How are the main models of KN‑7000 differentiated?

A: ‑KN‑7000A: Cart-type large swing arm model, irradiation area approximately 970cm², suitable for large-area treatment of the face, chest, and back; mainstream model for dermatology and medical aesthetics departments. ‑KN‑7000B: Desktop model, irradiation area approximately 390cm², suitable for small-area lesions in outpatient clinics, with flexible placement in consultation rooms.
The suffix indicates the configured light source: R red light, B blue light, Y yellow light, G green light, I infrared light. It can output single light or combined light, and can be selected according to clinical needs.

Q2: What are the clinical effects of each wavelength? 

A: 🔴Red light 633nm: promotes wound repair, accelerates wound healing, improves inflammatory skin lesions, and relieves pain; 

🔵Blue light 417nm: targets inflammatory acne, inhibits acne-related pathogenic bacteria, and reduces red and swollen acne; 

🟡Yellow light 590nm: soothes and calms, improves sensitivity and redness, and reduces wound pain; 

🟢Green light 520nm: improves pigmentation, brightens skin tone, fades spots and acne marks, soothes sensitive skin, and regulates dull skin; 

🔴Infrared 830nm: deeply promotes repair, relieves wound pain, and is used for postoperative wounds and infected wound repair.

Q3: Indications on the registration certificate? 

A: For use in medical institutions. Red/yellow/blue light is used for the treatment of inflammatory acne, eliminating inflammation and promoting skin wound healing; yellow light (590nm)/infrared light (830nm) promotes the healing of surgical, bite, and infectious skin wounds and relieves wound pain.

Q4: What are the core hardware configurations of the device? 

A: High-power LED matrix light source; multi-angle damped swing arm / stand; touchscreen display; supports continuous and pulsed dual modes; built-in multiple clinical preset protocols, adjustable time 0‑99min; treatment head can hover at multiple angles, suitable for irradiation of multiple body parts including head, face, and trunk.

Q5: In which clinical scenarios can it be used?

A: ✅ Mild-to-moderate inflammatory acne (red pimples, pustular acne) ✅ Various skin wounds: postoperative incisions, abrasions, bites, infected wounds ✅ Skin repair and redness reduction after photoelectric / fractional laser treatment ✅ Soothing and calming for dermatitis and sensitive skin ✅ Adjunctive repair treatment for burns and chronic wounds ✅ Adjunctive improvement of pigmentation, dull skin tone, acne marks, and spots (green light mode)

Q6: In which situations is use prohibited?

A: ❌ Malignant tumor lesion areas; ❌ People with photosensitive diseases or taking photosensitizing drugs; ❌ Direct eye irradiation; ❌ Acutely bleeding wounds; ❌ The abdomen and eyes of pregnant women must not be irradiated; ❌ Irradiation of malignant skin lesions is prohibited.

Q7: Can it directly replace medication for acne treatment? 

A: It cannot replace medication. It is a physical adjunctive therapy. For moderate-to-severe acne, it is recommended to combine with topical/oral medications to improve efficacy.

Q8: What is the standard operating procedure?

A: 1. Clean the skin before treatment, remove skincare products, ointments, and makeup; 2. The patient wears matching goggles and keeps the eyes closed throughout; 3. Adjust the treatment head and control the standard working distance at 5‑8cm (handheld model 2‑3cm); 4. Select the light source mode and set the treatment duration; 5. The device runs a countdown and stops automatically at the end; 6. After treatment, normal cold compress and skincare can be performed.

Q9: How to choose parameters for different conditions? 

A: Inflammatory acne: mainly blue light, red+blue combination may be used; wound repair, postoperative repair: red light / red + yellow light; sensitive redness and calming: yellow light; painful wounds: yellow light + infrared; pigmentation, dullness, and acne marks: mainly green light, green + red combination may be used for brightening and repair. Single session 10‑20min, 2‑4 times per week, follow the clinical protocol.

Q10: Is the closer the distance during treatment, the better the effect? 

A: No. Strictly follow the specified working distance of the device. If the distance is too close, excessive energy may easily cause skin burning and redness; if the distance is too far, insufficient energy will affect efficacy.

Q11: Will the light source harm the eyes? 

A: Strong LED light. Directly looking at the light source is prohibited. Doctors and patients must wear matching protective goggles to avoid eye light damage.

Q12: What adverse reactions may occur? 

A: Under normal tolerance, there is no obvious discomfort; a few may experience temporary skin redness and dryness, which is a transient reaction. The single session duration can be shortened and moisturizing strengthened; if persistent burning, stinging, or blisters occur, stop treatment immediately and consult a dermatologist.

Q13: Is sunscreen needed after treatment? 

A: After treatment, the skin is relatively sensitive. It is recommended to do daily sun protection and avoid sun exposure; during green light treatment for pigmentation, strict sun protection is especially needed, otherwise rebound hyperpigmentation may easily occur.

Q14: How should the device be maintained? 

A: After power off and cooling, wipe the treatment head housing with a soft dry cloth; do not spray liquid directly onto the device; do not directly wipe the LED beads with alcohol to avoid light source damage; regularly check the swing arm damping and light source output.

Q15: Warranty and training? 

A: Standard warranty for the whole machine is 1 year; the manufacturer provides installation and clinical operation training; long-term technical support is provided, and extended warranty is supported.