$0.65 each
100 or more $0.35 each
5mm Ultra-violet LED. Emits blue 395nm UV light. Water-clear lens. 3.7 Vdc, 20 mA. 30 degree beam pattern. Ideal for counterfeit bill detection, detection of fluorescence in minerals, black-light light poster lighting.
Average Customer Review:  (13 Reviews) Write A Review

Customer Comments

Average Customer Review:  (13 Reviews) Write A Review

A customer from LAGUNA NIGUEL, CA USA
Answers: Longevity, Killing Algae, Florescent Minerals
Longevity: Typically, UV LED that are not encased in silicone resin or mounted behind a quartz lens will have a life span of around 2000 hrs (the 50% output point). This is because the UV photons ionize and thus break down non-silicone resin. LEDs that are encased in silicone resin are more expensive (typically around $5 in quantity), so I doubt these are such. Quartz lens LEDs are even more expensive (more like $10 each). I Have some of both and they have been running continuously for years. Where as, the non-silicone LEDs that I have tested only ran for about a month before they were visibly dimmer. These are best for intermittant use, like counterfeit bill detection.

Algae: To control Algae you need a shortwave UV source. This, and all other UV LEDs are longwave and thus will have no effect.

Regarding use with florescent minerals, this LED will only work on minerals that fluoresce under longwave UV. But, there are some very pretty minerals in that category!

A customer from NJ
perhaps the first poster had a problem because they didn't use the right resistance. use V=IR use for V voltage to be dropped. so 5-3.7+1.3 so plug 1.3 in for V 1.3=.02R R=65 ohms that would help make your led a bit brighter.

A customer from MILFORD, NJ US
I have an old car (1987 Plymouth) and the dashboard lights are all incandescent and rather dim (or burnt out). Since I drive home at night fairly often, not being able to clearly see my speed has been a problem (haven't been pulled over yet, thankfully :). I had modified the bulb holders with a resistor and an LED in each, but that didn't prove to work so well. This time I surrounded the perimeter of the gauges with the UV LEDs and went over the white letters in orange highlighter. The effect is simply amazing. I am using 5 of them in series-parallel straight off of my car's 13.8v. When they're working you'll know it. They produce a fairly bright purple when lit, but if you stare into it it'll feel like its much more powerful, leaving behind a spot in your eye.
Great LED!

A customer from HOLLAND, PA US
really a question
will this kill algae. I'm trying to put a few UV-C lamps(the type that kills algae) in my fish tanks pump.

A customer from San Bernardino, CA
Usable UV-A
The ULED-2 output is less visible than other company's bluish UV LED's at 400 to 405 nm. It works better since the eye is less sensitive to the 395 nm emission.

I bought ULED-2's to replace the eight white LED's in a cheap 3xAAA battery light. The result works very well. Several minerals that usually fluoresce in UV-A: many fluorites and calcites, most ruby, and wernerite. ***

A note - never look into a cluster of these UV diodes, they are not TOO harmful but you cannot judge the true power in the beam. That makes it potentially dangerous for the eyes.