Equipment type
Full-hand UV/LED nail lamps: wavelength, size and limits
What makers state for full-hand nail lamps: wavelength, timers, size, input and safety marks, why LED lamps can emit UVA, and the care catches to know.
Also listed as nail lamp, UV LED nail lamp, gel lamp
Short answer
A full-hand lamp is a desk lamp large enough for a whole hand, used to cure gel products. Makers state wavelengths such as 365 + 405 nm (SUNUV) and 365-405 nm (MelodySusie EOS 3), which means LED lamps can emit UVA. Whether a lamp cures a given gel is the gel maker's call, not the lamp's.
Key facts
- What it does
- Desk lamp sized for a whole hand, used to cure gel products[1][2]MelodySusie notes that an LED lamp may cure a UV gel slowly or not at all, so check the gel maker's lamp requirement.
- Power source
- Corded; MelodySusie EOS 3 uses a DC 30 V 1.2 A adapter[3][4]SUNUV says all of its nail lamps are corded.
- Input voltage
- 100-240 V 50/60 Hz (MelodySusie EOS 3); SUNUV publishes no adapter input rating[4][3][1]SUNUV offers US, UK and EU plugs and tells US-lamp owners traveling to the UK or EU that they need a voltage converter. MelodySusie may ship a conversion plug rather than a native plug.
- Wavelength (claimed)
- 365 + 405 nm (all SUNUV lamps); 365-405 nm (MelodySusie EOS 3)[3][4]Claimed, not measured. 365 nm is in the UVA band.
- Lamp size
- SUNUV SUN2C: 7.95 x 7.28 x 3.94 (no unit given, inches implied), 2.3 lb; MelodySusie EOS 3: 8.66 x 8.11 x 3.94 in, 248 g[2][4]Maker specs. SUNUV's page does not state the dimension unit.
- Timers
- 15/30/60/90 s (MelodySusie EOS 3); SUNUV SUN2C lists two different preset sets on one page[4][2]The SUN2C page gives 10/30/60 s plus a 90 s low-heat mode in one place and 10/30/60/99 s in its spec table.
- Safety marks
- SUNUV states its lamps meet ETL, FCC, CE and RoHS requirements; MelodySusie names none for the EOS 3[2][4][5]We did not find the SUNUV model in Intertek's directory. An FCC mark is not a UL/ETL/CSA safety listing.
- Warranty
- SUNUV product pages: 2 years and 60-day returns; OPI Star Light: 2-year limited warranty[2][6][7]SUNUV's FAQ still says a 12-month warranty and 30-day returns (read 2026-10-07). Ask SUNUV which applies.
- What no source measures
- The actual output of current models[8]Wattage and wavelength are maker claims. A 2018 study of 28 devices found each had its own spectral distribution and peak intensity.
Watch out for
- "LED" does not mean no UV. LED describes the light source. A 2021 Australian study measured UVA from all eight home curing devices it tested, seven of them LED.
- No lamp cures every gel. MelodySusie says an LED lamp may cure a UV gel slowly or not at all. Follow the gel maker's lamp requirement.
- The LEDs are not replaceable on SUNUV lamps. SUNUV says the beads are built in and it does not sell LED boards.
- Keep acetone away. SUNUV says its lamps are not specifically designed to resist acetone.
- Cords are model-specific. SUNUV does not sell replacement power cords, has not identified a compatible third-party cord and says non-SUNUV cords may void the warranty.
- Warm is normal, per SUNUV. SUNUV says its lamps can feel warm or hot during use and recommends SPF 30+ or protective gloves.
OPI's Star Light lamp is sold to professional nail technicians only; it has a manual/auto hand-sensor mode and a replacement adapter with a US plug.
Read do LED nail lamps emit UV?, nail lamp wattage and wavelength and will any lamp cure any gel?.
Questions
Do LED nail lamps emit UV?
They can emit UVA. SUNUV states 365 + 405 nm for all its lamps, and 365 nm is UVA. A 2021 Australian study measured UVA from all eight home curing devices it tested, seven of them LED, with no UVC and only trace UVB from the one fluorescent unit.[3][9]
Will this lamp cure my gel?
Ask the gel maker. MelodySusie explains that UV lamps emit about 350-380 nm, LED lamps about 380-410 nm and dual-band lamps 350-410 nm, and that an LED lamp may cure a UV gel slowly or not at all.[1]
Is a higher-wattage lamp stronger?
Wattage is rated power, not output at the nail. A 2018 study of 28 nail dryer devices found each had its own spectral distribution and peak intensity, and a 2021 study found price did not indicate lower UV output.[8][9]
How does the FDA classify nail lamps?
The FDA lists a "cosmetology UV lamp" (product code RGQ) as a UV light source used on skin, nails or hair for cosmetic purposes. No specific performance standard applies; only general radiological health requirements do.[10]