Bright UV Light 365 nm High Power LED Two Rows 2835 Ultraviolet Diode Tape

Superb. My use is for a UV exposure box to make palladium-platinum photographic contact prints from 8x10 inch black and white negatives. The light sensitive ferric salts in the sensitzing material respond to UV between 365 nm and 400 nm. Past experience with specialty LED strips at 365 nm were acceptable but not spectacular. My recent trials with very cheap, 395-405 nm blacklights marketed for party lighting or for curing some resins were better. This double-row, 480 diode-per-meter tape with its high density and brightness seemed like a no-brainer. The printer I made is at least 4x faster than the 'cheap party-UV' version. In photographic printing, the production limiter is always the print exposure time. This will mean typical exposures which have ranged from around 5 to about 20 minutes now require as little as 1 minute to something like 5 or 6 minutes. Success!! During the ordering process I intervened to modify myorder, resulting in a balance due me as refund or store credit. I requested a refund, but that was before seeing that the kind of result I hoped for but wasn't 100% confident would actually be the case, was the case. Very likely I will order more -- the quality and brightness are simply irresistable. Who knows -- for the ferric iron light-sensitive material in this case, maybe the 365 nm flavor will work just as well or better. (Shorter wavelength = higher energy? With the ‘all things being equal’ caveat.) In the meantime just the fact that superlighting's range of products is staggering, far beyond what my niche case requires, makes it plain fun to come back. And shop. The printer I built is a wooden box topped by a 2 mm thick aluminum sheet to which 20 each x 50 cm tape strips are adhered, each strip tight against its neighbors. With the two reels, or 10 meters of tape I ordered, this produces a diode dense rectangle 30 cm x 50 cm, large enough to cover the 8x10 inch (20 cm x 25 cm) print area with generous margins of strong light. Do the math: 480 diodes per meter, 4.800 diodes in an area of 1.500 square cm. A Mean Well 24v 350w constant current supply drives the LED strips. I have adjusted the voltage to 25.0v, measured at the bus (+ at one end, - at the other) to which each strip connects. This may shorten the LED or driver life but not enough to matter, given the use duration in this case is a tiny fraction of what it would be in more usual applications. I very much appreciate superlighting's professionalism and prompt responses to question. 'VIOLET' was on the spot more than once, to the good. Eleven thumbs up.

I've tried several "UV" strips before, but most are actually 395nm-405nm, which have too much visible purple light for my application. This true 365nm strip from SuperLightingLED is exactly what I needed. The visible light is minimal, but the UV output is incredibly powerful. The double-row 2835 design is a beast. I'm using it for UV resin curing and mineral fluorescence, and it cuts down my processing time by nearly half compared to single-row strips. The thermal management on the PCB is impressive for this power level. If you need a serious UV source for industrial or scientific use, this is the real deal. Don't waste your money on the cheap "blacklight" versions; get this one.