From the pictures it’s not clear whether they are definitely the same / definitely not the same. On the eBay picture I cannot see the silver corner markings that are clearly visible on Hank’s. Hank’s LED appears to be sitting on a white ceramic base with silver markings in 3 corners and a green marking in the fourth. The 20mm star eBay picture does not clearly show any markings in the corners other than possibly the green one in the corner facing away from the camera.
The specs on all the above LEDs appear similar to the IOS ones.
I guess UV LEDs are much, much less efficient than visible spectrum LEDs (25% or something?) but I still question whether I need them mounted on Noctigons at low drive currents like 1A (so maybe <3W dissipated as heat).
I want to light up some GITD plastic. It seems like 365nm emitters emit the least visible light and would be the most impressive, assuming that they cause the GITD stuff to fluoresce. Anybody have any thoughts on that? I'd rather avoid shelling out for a handful of 365nm emitters only to learn that I need a longer wavelength to get the GITD plastic to glow.
Ordered these this morning (I’m converting my Tn30 to UV, was planning on LEDENGIN LZ1’s but couldn’t resist 10 of these for less than the price of 1 LZ1). You’re welcome to buy one or two once they come for eval. PM me in 2 weeks so I remember… Actually Alex you’ve always helped me out, PM me your address in a couple weeks and I’ll mail you one no charge.
365nm is the point where maximum florescence effect and less visible light. unfortunately 365nm leds are very expensive. Even we don’t know real wave length of above cheap UV leds. so we can’t say which led do better. this is my idea.
Mattaus I was referring to the “365nm” ones I’d posted links for in post #60. On stars they come out to something like $4.75/ea or $4.40/ea in QTY10 (mounted on MCPCBs). If they are really a lower wavelength than the ones Pavithra_uk linked in post #62 I might not mind paying for that… as long as my GITD plastics fluoresce well under the shorter wavelength. As Pavithra_uk pointed out they may not really be what they say either!
Thanks Cereal_killer. If I haven’t already broken down and purchased a few of those by the time yours arrive I’ll drop you a line.
Attempted to order these, got an email today from Aliexpress that the seller took to long to ship and the order got canceled. I’ve contacted the seller, once funds are returned I’ll try it once more, its just such a good price. otherwise I’ll try those ones from ebay 2 for $10.
Update again, the AE one’s are no longer available at all. I have 2 of the silver base ones coming from ebay (I made a $7 offer, they came back with $7.60).
I’ll have my first LEDENGIN 365nm LZ1 light running by the time they come to compare, I also have an LEDENGIN dental blue and numerous CREE 460nm “royal blue” LED’s so I will make a thread about them all when its all done.
395-400 - Very close to visible blue vs. true UV. Plus $2.00 shipping but if I order several of these...
Hmmm... I assume the plastic in a Carlco 3-up optic would filter the UV from one of these wouldn't it? Can anyone comment on using the Carlco with the UV emitters? Or what about using the cheap optics in a light like this: https://budgetlightforum.com/t/-/13696
I'd like to make a high-powered triple UV-light but don't know any good budget host options. The Carlco in a compact EDC-type host would be awesome if possible...
I've reflowed the first one onto one of the cheap copper non-DTP 16mm PCBs from FastTech and built up a new P60 drop-in. I used my new favorite single-mode driver from Fasttech:
...with one of the 7135s removed to keep power at ~1A.
This light compares favorably to my older Manafont-purchased UV drop-in using the old-style 3W emitter. This drop-in causes fluorescent objects to glow noticeably brighter than the Manafont drop-in. I attribute that to the better-focused SMO reflector instead of the off-center generic-style emitter and OP reflector used on the Manafont module. There is a fair bit of purple in the light, as expected. Of interest, I did find a lot of centipedes in the back yard that fluoresced interestingly; their bodies blended into the background well, but their legs would glow bright yellow under the UV...
