PhotonWrangler
Flashaholic
While looking through Wally World recently I stumbled across an A19 LED filament "black light" bulb. Being a UV nerd I picked one up to see if it would be useful for fluorescent mineral stuff. Their P/N is GVLA198K. There is also a TCP P/N WF120008.
It turns out that there's NO UV coming out of this bulb at all - just a dim blue glow. It wasn't able to fluoresce anything and my UV detector card said "nope."
I wanted to see if the dark blue envelope was passing UV by shining a known-good UV flashlight through it and that worked fine. This tells me that the problem is with the choice of LEDs themselves. I'll probably crack this open to see what it's using.
The bulb isn't even useful as a blue lamp since it's output is so dim. Don't waste your money on this one.
It turns out that there's NO UV coming out of this bulb at all - just a dim blue glow. It wasn't able to fluoresce anything and my UV detector card said "nope."
I wanted to see if the dark blue envelope was passing UV by shining a known-good UV flashlight through it and that worked fine. This tells me that the problem is with the choice of LEDs themselves. I'll probably crack this open to see what it's using.
The bulb isn't even useful as a blue lamp since it's output is so dim. Don't waste your money on this one.