When you buy a 365 nm blacklight, it's extremely important to understand what you are buying. 365 nm is at the very edge of light that is visible to the human eye. There are fewer cells in our eyes that are sensitive to this wavelength, and so the light from this flashlight LOOKS dim and weak. Unless you shine it within inches of your hand, you won't see the light at all if you're looking at it in normal lighting conditions. The light from this flashlight is very pale purple-ish blue, not the deeper purple of cheaper LED blacklights. But when you shine it on items that fluoresce, it makes them light up like crazy!
If you want maximum oomph on glow in the dark or fluorescent items, 365 nm is definitely the way to go.
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Purchased this item to test for NDT applications. Using our calibrated spectroradiometer, the LEDs put out UV-A at 375nm, not the 365nm as advertised. This disallows it from being used for fluorescent NDT inspections. Do not believe the specifications published or printed on the product.Best Deals for Ledwholesalers Gallium Indium Nitride 365 Nm Uv LED Ultra Violet 9
I put batteries in this flashlight and, it was a whole new world opened up.. Places I thought I cleaned would show smudges and stains that I cannot see under regular light. I even checked bills, it will tell you in a big hurry if your dollars are real or not. Its effective range outside is around 15 feet but other than that, works as advertised.Honest reviews on Ledwholesalers Gallium Indium Nitride 365 Nm Uv LED Ultra Violet 9
This light is excellent if you are looking for a fairly cheap true black light. The light is barely visible but it illuminates a wide range of UV responsive materials well. I tested it with Ukraine and US currency and it glowed. The 365 nanometer light wave makes all the difference. Don't settle for anything more in frequency as you will lose responsible.The housing was better than expected. I've bought things like this before and they usually broke quickly, had lose parts, or had LEDs burn out. This was not the case with this product. I'd buy form this place again. Hope this helps people!
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For the price, I didn't expect a great deal from this so-called Gallium Indium Nitride 365nm UV flashlight. I received it along with a pair yellow "protective" safety glasses(sold separately) promptly, a few days after placing my order. The flashlight was packaged in bubble wrap inside of a small cardboard box and the glasses came in a thin, open plastic bag. There were no instructions or paperwork of any kind for neither the light nor the glasses. The flashlight physically appeared as advertised, ie: 3.75" long, 1.125" thick, black anodized aluminum, tail cap switch, etc... The construction is quite shoddy. The cheap, plastic lens was cracked, right out of the box. Removing the tail cap reveals a standard(albeit very cheap) plastic 3xAAA battery carriage. Inserting the batteries is a no-brainer... negative(-) goes to the spring. The unit did not work at all at first. I had to bend, pry, and cajole the springs and tabs on the carriage in order to get proper contact to the batteries, after which it functioned fairly consistantly. I don't have access to equipment to test the peak output wavelength, but I have quite alot of experience with UV lighting and it APPEARS to be somewhere in the neighborhood of 365nm as advertised, as there is very little visible light emmitted from the nine tiny LED's. I tested this unit and it did cause white objects to fluoresce as well as some yellow and orange irridescent items. I was also able to see the UV security marks on my driver's license and cat urine stains are faintly visible under this light. This is however an EXTREMELY weak light and these things can only be seen in nearly absolute darkness and at very close range. Bleached white objects will fluoresce from a few feet away in a totally dark room, but others require the light being held no more than a few inches away, which creates a significant amount of glare from the near UV that bleeds out of this unit. The yellow safety lenses seem to work well enough for a weak, low output light of this kind and they do a fair job of cutting the near UV glare, but I wouldn't trust them with a more powerful UV light. They are also very small as if they were made for a child and quite uncomfortable. In closing, I would say that this light would be adequate for ID verifcation, counterfeit detection, or charging phospherescent fishing lures, if not for it's low output and cheap construction. It is only moderately effective in complete darkness and I don't expect that it will hold up under regular use. If you really need a 365nm UV flashlight for under $200, I would recommend looking into tank007. They're a bit more powerful, more solidly conscructed, and have glass lenses, but if you need one to consistantly perform effectively on the job, pay the money and buy professional equipment. This Ledwholesalers unit is little more than a toy.
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