Re: blacklights « Reply #1 on: April 09, 2014, 05:31:12 AM » Author: dor123
Incandescent blacklight lamps, don't produces UV at all. Blacklight blue fluorescent lamps, I've seen mainly in linear T12 or T8, or compact fluorescent lamps (Including self-ballasted CFLs). Never seen circular fluorescent blacklight lamps. Their phosphor coating converts short wave UV from the mercury to long wave UV. Mercury blacklight lamps are used mainly for night clubs, theatre and at the stage. There were also self-ballasted mercury lamps. The 365nm spectral line of the mercury, produces the long wave UV directly, without the need of phosphors. There are also near UV, violet and long wave UV LEDs in flashlights that intended to check money.
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I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.

	Re: blacklights « Reply #3 on: April 09, 2014, 02:30:45 PM » Author: Medved
The incandescent does produce a little bit of UV-A, mainly when driven at a bit higher temperature. And quite significant it is with halogens: The 300K extra mean the UV reaches even unsafe levels, so have to be explicitly filtered out, it even reaches the UVB range (but just in mW range). The BLB incandescents are here the most easiest type of BLB: It is available in most DYI shops and it is the cheapest source, even when it tis the weakest one (a 100W lamp emits few 100's mW, versus ~8W from an F36T8 or ~4W from a 125W MV)
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	Re: blacklights « Reply #4 on: April 09, 2014, 05:50:57 PM » Author: themaritimegirl
12 years ago or so I had a pen that wrote invisible ink, and built into the pen was a UVA LED that you could use to view the written ink.
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	Re: blacklights « Reply #6 on: April 10, 2014, 12:59:44 PM » Author: migette1
Leslie welcome to LG some time ago I put a comparison on You Tube showing a standard so called blue uv which had a filament and can be bought at Maplin, These have nil uv and are just a deep purple lamp which gets very hot. The other one was a black glass CFL which did give out uv. To test that put the light near some washing powder and it fluoresces also white paper shows up very white. I once had the self ballasted black light source which uses Woods Glass these are very good. but my one had a damaged inside and it was all to one side in the envelope. Be careful and avoid looking at it alight does harm to the eyes as do the other fluorescent types of BLB. While on this subject never look at one of those clear quartz (ones used for sterilising purposes) or view behind thickish piece of glass or jam jar note  ozone smell.
« Last Edit: April 10, 2014, 01:02:16 PM by migette1 »		Logged

Interested in the history of electric lighting and incandescent in particular and neon glow lamps.

	Re: blacklights « Reply #9 on: May 06, 2014, 12:23:16 AM » Author: Medved
For a real sunburn you need really high exposure and for that the incandescent sources are not that strong at all. But the safety limits are set so, you even do not notice any effect of the UV, so even no slight tanning or so. The problem with unprotected haologens is, even when they are not able to cause sunburns alone, they do add up to the overall UV dose. So it may e.g. unexpectedly worsen the sunburns you get from the day at the beach...
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No more selfballasted c***

	Re: blacklights « Reply #10 on: May 06, 2014, 03:35:32 AM » Author: dor123
Generic self ballasted CFLs in Israel (Hyundai, Eurolux), have warning on their boxes that you shouldn't operate them from a distance less than 30-40cm, because of UV radiation...
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I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.

	Re: blacklights « Reply #11 on: June 01, 2014, 01:55:40 AM » Author: nicksfans
Here's a BLB circline: http://www.elightbulbs.com/GE-14681-FCA21-BLB-BLACK-LIGHT-CIRCLITE-KIT-Circular-Fluorescent-Tube
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I like my lamps thick, my ballasts heavy, and my fixtures tough.

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	Re: blacklights « Reply #12 on: May 26, 2015, 11:23:09 PM » Author: Solanaceae
I thought I saw a black light HPS a while ago.
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	Re: blacklights « Reply #13 on: May 27, 2015, 12:02:07 AM » Author: themaritimegirl
Quote from: Solanaceae on May 26, 2015, 11:23:09 PM I thought I saw a black light HPS a while ago. I don't think HPS lamps make enough UV to function as blacklights. I've certainly never heard of one, anyway.
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