On Sun, 30 Aug 2015, Chuck Guzis wrote:
On 08/30/2015 05:55 PM, Tothwolf wrote:
Wrong type of UV. You are mostly getting long wave UVA outdoors, so
blacklight lamps would seem to be the correct (and MUCH safer) choice.
When I looked at 24" T8 bi-pin blacklight lamps, they were going for
about USD $10 per lamp.
Oh, but there's that aitch-nu thing--I suspect that the UVC lamps would
do the job very quickly. I recall that someone tried the de-yellowing
process with UV LEDs and got nowhere fast. So probably UVB at a
minimum.
Maybe...maybe not. I do know from experience that short wave UVC from
germicidal lamps can photodegrade certain plastics, PVC in particular. UVC
germicidal lamps can also cause serious eye damage in very short order.
Even the really small UVC lamps used in an EPROM eraser are hazardous,
which is why they have interlock switches that disable the lamps when
open.
You are going to get a _lot_ more UVA exposure than UVB outdoors, but who
knows. You aren't going to get much UVC outdoors though.
A typical T1-3/4 UV led doesn't put out anywhere near the energy that a
bi-pin/fluorescent lamp does, so unless you had a large array of high
output UV leds, I really wouldn't expect all that much from them.
