# Anyone know where I can get some UVC LED's?

#### AgentSmithers

Joined Jan 14, 2011
77
So far the only thing I found reasonable is located here but anyone knows a better place to source something like this? Is that the cost of a normal UVC LED. I see them ranging all over the place and I understand the difference in nanometers of the wavelength but what I'm not sure if is if $12.00, in general, is what these normally go for? Does anyone have any insight? Thank you!! https://www.digikey.com/product-detail/en/vishay-semiconductor-opto-division/VLMU35CL00-280-120/VLMU35CL00-280-120CT-ND/10246235 #### SamR Joined Mar 19, 2019 2,040 Those are 2 very different diodes. What exactly do you want and the circuit you plan to use it in? Thread Starter #### AgentSmithers Joined Jan 14, 2011 77 I am trying to make a germicidal UV wand. I've done hours of research and wanted to land on something between the 200 to 220NM wavelength but can't find anything readily available in this range.. So far when shopping for these LED's these things seem expensive but I am uncertain how strong these LED's are. Below are samples of which I've done some shopping. It seems the best deal for any of these is the$3.00 RC35RO-u280's which is pretty darn close to 265-275 (optimum Germ killing range). But I would love to use something that is a bit more powerful if anyone has any better idea's. I would like the wand to work from afar as possible so these LED's may not be the correct solution?

Compare LED’s

Voltage seems high?

https://www.aliexpress.com/item/33015433095.html?spm=a2g0o.detail.1000014.45.3e383bbclZtHkc&gps-id=pcDetailBottomMoreOtherSeller&scm=1007.13338.128125.0&scm_id=1007.13338.128125.0&scm-url=1007.13338.128125.0&pvid=cdbffe44-d9f5-439b-8ac6-fd1c3f131c2a

Deep UV 10mW

https://www.aliexpress.com/item/4000624878510.html?spm=a2g0o.detail.1000060.1.c0185c3eSnZevH&gps-id=pcDetailBottomMoreThisSeller&scm=1007.13339.146401.0&scm_id=1007.13339.146401.0&scm-url=1007.13339.146401.0&pvid=b64c63e3-473f-4fe8-bd08-fabffd772872

3838 are bigger then 3535

https://www.alibaba.com/product-detail/6565-4-chips-30mW-40mW-germicidal_60708877168.html?spm=a2700.galleryofferlist.0.0.216d6184j26pMc

These are +6565 at 30-40mW?

https://www.alibaba.com/product-detail/275nm-280nm-285nm-Germicidal-deep-UVC_60828025641.html?spm=a2700.wholesale.deiletai6.17.efcd5a7bWdjamo

https://www.alibaba.com/product-detail/germicidal-3535-uv-led-275nm_62137214800.html?spm=a2700.details.deiletai6.7.7b4c1d87Drm073

#### SamR

Joined Mar 19, 2019
2,040
Typical problem w/ AliX is lack of documentation that you will need to ensure the efficacy you are wanting.

#### BobaMosfet

Joined Jul 1, 2009
1,066
@AgentSmithers
Be very careful with UV, you can blind yourself. UV is a spectrum that is dangerous to the human eye. Get yourself UV goggles, or a welder's helmet in a pinch and protect yourself any time they are on. Do NOT let other people around you when using them, either without eye protection.

UV 'A', 'B', and 'C' light spectrums offer different dangers.

Although the above information comes from a source for eyes and an article related to children, it should be taken as a broader narrative for information to protection your eyes at any age.

https://www.pointsdevue.com/article/efficient-protection-sun-childrens-eyes

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#### jpanhalt

Joined Jan 18, 2008
9,113
I am trying to make a germicidal UV wand. I've done hours of research and wanted to land on something between the 200 to 220NM wavelength but can't find anything readily available in this range.
For 200 nm to 220 nm, a deuterium lamp will work. For germicidal work, however, 254 nm is fine (low pressure mercury). Even longer wavelengths will work. The longer wavelength you can go (within imits), the easier it will be to get materials, such a "window" for you wand.

Edit: Clarified that "longer" meant "longer wavelength."

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#### DickCappels

Joined Aug 21, 2008
6,312
Get yourself to Shenzhen, that is the best place to pick up UV LEDs (or any other kind) and where you can make a contact with a dealer and hopefully the manufacturer.