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Real 365 nm ultraviolet. The beam is nearly invisible, so the room stays dark and only the fluorescent things glow: paint, props, uranium glass, resin, minerals.
Real 395 nm ultraviolet. A strong purple wash fills the room and lights up paint, props, and decor, the classic party glow
Wavelength
Not sure? Pick by job
Power
Lighting a big space? Calculate Quantity
One light, ready to plug in. Nothing to wire.
Die cast aluminum body with tempered glass lens
Die-cast aluminum body with tempered-glass lens
Pre-attached, tilts for floor or wall mounting
Sealed and attached with grounded US plug
Mounting, distance and UV-A safety explained
The bracket is the stand, the wall mount and the ceiling mount. No extra parts.
Set it on the bracket and tilt the head up at the wall, props or backdrop. Bring it to a party, a shoot or a moth sheet and take it home after.
Two screws through the bracket, then tilt the head down toward the crowd. Height of 8 ft or more keeps the beam out of people's eyes and covers the floor.
Same slots, upside down. Venues and arcades run several from rafters so the light comes from more than one direction and nothing hides in a shadow.
From our reviews and the questions we get.
Halloween and haunts
Resin and 3D-print curing
Uranium glass and minerals
UV photography and body paint
Moth sheets and field surveys
Venues, murals and glow sports
Glow Parties
Birthday backdrops and neon signs
Halloween Parties
Bedroom and game room
Window and store displays
Church, school and kid’s events
A lot of "365 nm" floods are 395-405 nm LEDs with a new label. You can test ours in your own hallway the night it arrives. If it fails any of these, send it back within 30 days.
365nm395nmHold your hand between the light and a white wall. A 395-405 nm light casts a hard purple shadow. A true 365 nm beam is invisible, so the wall just fluoresces faintly around a soft, barely-there shadow.
365nm395nmPoint your phone at the lens from across the room. Camera sensors pick up 365 nm as a dim blue-violet. If the lens looks bright purple to your naked eye, that is visible violet light, not UV.
365nm395nmPut a sheet of printer paper on a dark floor. Under 365 nm the paper blazes blue-white (that is the optical brightener in the pulp) while the floor around it stays black. Under 395 nm the whole floor is purple.
“The 100 watt really spreads and makes my black light tapestries glow super bright.”
We sell both. They are different tools, not a good one and a cheap one.
365nm
395nm
Enter the area you want lit. Coverage figures assume a dark room. Outdoors or with other lights on, add one more unit.
Space
Area: –
Placement:
Five things differ. Everything else is the same light in two sizes.
What's different
Pick by the space you're lighting
365 nm · 50 W
Rooms, cabinets, portraits
395 nm · 10 W
Shelves, desks, window displays
365 nm · 100 W
Yards, stages, full-body shoots
395 nm · 50 W
Rooms, parties, garages
up to 530 sq ft
up to 100 sq ft
up to 1,220 sq ft
up to 530 sq ft
50 W
10 W
100 W
50 W
45
10
90
45
8.1 × 6.3 in
about a paperback
4 × 3.2 in
about a paperback
10.3 × 8.1 in
about a sheet of letter paper
8.1 × 6.3 in
about a sheet of letter paper
The most common surprise in our reviews is the back of the light getting too hot to touch a few minutes after switch-on. Here is what is happening and how to set it up so it runs for years.
UV LEDs create heat, and the finned aluminum housing pulls that heat away from the chips. Hot fins mean the cooling is working.
Leave a few inches of open space behind the light. Don't wrap it, box it in or lay it face-down on fabric, so the heat has somewhere to go.
Adjust the angle by the bracket, not the body. Switch off and give it ten minutes to cool before you move or pack it.
Hours-long events and all-night displays are what it's built for, as long as air can move around the fins.
If LEDs ever go dark, we replace the unit.
2-year replacement warranty. No return shipping, no restocking fee.
Shipping, returns and warranty questions are answered on their own pages.
These are about the light.
Not the 365 nm. Most "UV lights" are 395–405 nm, which sits at the edge of visible light and washes the room purple. A true 365 nm beam is nearly invisible, so the room stays dark and only fluorescent things glow. The 395 nm does give a visible purple wash; that is what it is for.
Go by the space. On 365 nm, one 50 W lights up to 530 sq ft in the dark and one 100 W up to 1,220 sq ft. On 395 nm, one 10 W covers about 100 sq ft and one 50 W up to 530 sq ft. The calculator above works it out from your room's length and width.
Yes, with the 365 nm. Most 3D-print resins and UV resins and glues cure at 365–405 nm. Check your resin's label for its curing wavelength and follow its recommended time.
Camera sensors pick up 365 nm as a dim blue-violet, so a strong 365 nm light looks weak on screen. Judge it by how brightly fluorescent things glow, not by the lens. It is UV-A, generally safe for skin and eyes in normal use, but don't stare into the lens.
It is IP66 sealed, so rain is fine; don't submerge it. It runs from 0 to 100 °F. The back gets too hot to touch a few minutes after switch-on: the aluminum body is the heat sink doing its job. Leave a few inches of open air behind it.
There is an on/off switch on the power cord. It is not dimmable, so don't run it through a wall dimmer.
If LEDs go dark within two years, we replace the unit, with no return shipping and no restocking fee. If it isn't the glow you expected, return it within 30 days for a full refund.
