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Registered Member #2463
Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
Yes, you can get the phosphor from a fluorescent lamp to glow if your tube is producing 254 nM. The powder will glow if there is no glass in the way (i.e.) the UV has to strike the phosphor directly.
If somehow you could slice the old lamps to get the phosphor as it is sprayed on the glass , it would block the UV just like it does in an entire lamp.
A 30 watt germicidal lamp slid into the glass tube of a 40 watt lamp glows very brightly.
Registered Member #3637
Joined: Fri Jan 21 2011, 11:07PM
Location: Buffalo, NY
Posts: 1068
radiotech wrote ...
Yes, you can get the phosphor from a fluorescent lamp to glow if your tube is producing 254 nM. The powder will glow if there is no glass in the way (i.e.) the UV has to strike the phosphor directly.
If somehow you could slice the old lamps to get the phosphor as it is sprayed on the glass , it would block the UV just like it does in an entire lamp.
A 30 watt germicidal lamp slid into the glass tube of a 40 watt lamp glows very brightly.
Could I just somehow pry off the ends of a fluorescent tube? Or, is that a bad idea due to the ... nasty stuff inside of them?
Registered Member #2463
Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
Yes you can. Cautions : teeny glob of mercury. The chemistry of phosphor may be Calcium Halophosphate depending on lamp color.Look on lamp sites for that site..
If you carefully take end off, then release the seal-off, slowly if possible so as not to fling glass sand down the tube and ruin coating. Look at what you see. then decide what to do. Small three-corner file etc. Here's a photo of a 40 watt tube opened, and a 30 watt germicidal lamp stuck inside. The red wires are to power both ends of the G-lamp.. The apparatus is not operating in the photo, the white of the tube is just room illumination.
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What to do with an oxidizer tube? (ionizing UV!)
