Hi gang
I’m looking to buy a uvb flashlight or flashlight module to use for dermatology.
The clinics use fluorescent Phillips TL01 tubes @ 311nm.
Do you know any LED flashlight that can do this?
(Not looking to diy as I’ve got way too many projects already)
Thanks
Whoa… that’s a 6ft tube!
You want a single fixture (can be had from industrial-supply stores), or suntan-booth style with like 5-10 tubes on a panel?
Same fixtures like for warehouses (ie, on the ceiling) would fit 6ft tubes, and have any ballasts, etc., already wired in. Could probably get singles, or fixtures for 2, 4, or more tubes in parallel.
My bad, i want clear. I’m looking for a LED flashlight or module that’s around the 310nm range (edited OP to make this clearer)
Ah. Hard order to fill as most UV emitters are 395nm (purpleish) or 365nm (better) with rare entries for… was it 265nm?.. but they’re not overly powerful.
You’d need to buy an assload of 'em to come close to the intensity of non-fluorescent “fluorescent” tubes.
I ain’t even sure if there’s a phosphor to convert 265nm to… 310nm, you said? Because I haven’t heard of a direct emitter of that wavelength. Not saying one doesn’t exist, just that I haven’t heard of any.
Yeah, I found some emitters at that range, i even found a $100ish flashlight in the range, but no specs on how bright. They’d need to be comparable in brightness or at least 1/2 and I could double exposure.
Welcome back! The forum software says this is your first post in 7 years!
For dermatology, what kind of power do you need? I guess units are mW?
LED still isn’t that good at these low wavelengths, might be better with tubes.
Google suggests the short 9W PL-S type bulb puts out 1W of UVB.
If you’re set on LED, Google sakowuf solutions, you might be able to get a custom light built.
Always been more of a lurker than poster, though i left the hobby when i realised i had way too many flashlights and needed to move to a smaller apartment. Though i still keep some parts that don’t have a home.
I wouldn’t mind upgrading some of these, do they still sell the complete pill/modules somewhere? Or has the modular factor died off?
Anyways, i just had a long conversation with chatgpt and helped me with the math to see if this is worth doing. Short answer is no.
Apparently i need 120 leds at 1 watt power output each to match the power of one uvb tube, turns into an impossibly expensive thing.
Not the offering there used to be, for upgrades, it depends on what parts you need; for some lights it might be as easy as doing some LED swaps to newer LEDs. Depending on the age of the lights, new LED will be significantly or slightly more efficient, also available now are far more quality offerings in multiple CCT and or high CRI. Nichia 519a is particularly popular.
It looks like Convoy is now offering the C8 with a 310nm UV emitter. Oddly, I don’t see any discussion of it in the Convoy thread.
There’s not much info in the product listing, and what is there is specific for the 255nm version.
Nice find, mighty email them to ask about led and driver, since power ratings are usually BS.
While LED might not be powerful enough in comparison to incandescent, maybe it can work, if focused on a single spot. Just need to run the calculations
Old thread but I came across it and have some input.
A good UVB emitter will produce about 500mW radiance, in a decent host it will have a beam of about 10cm across (~100cm2 for ease of approximation), giving 0.005 w/cm2. Photo therapy using UVB takes 5-15 J/cm2 per session, so you can get that at 100-300 seconds of exposure. Such a light would cost ~$180 or so.