Most quality halogen bulbs already have a UV protection coating. Anyhow, metal-halide lamps also use a disk of tempered glass, primarily to protect against explosion hazard of the bulbs, but also to filter excess of UV from the light. You can compare the working of that filter with that of a photographic UV-filter (not the pink haze filter, widely used in the US).
eric -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Charles MacDonald Sent: vrijdag 31 mei 2013 6:14 To: [email protected] Subject: Re: [neonixie-l] 866 Mercury Vapor Rectifier as Novelty Lamp On 13-05-29 02:02 PM, JohnK wrote: > The small QI/Halogen downlight globes come/came in a couple of > styles.... one with the small QI/Halogen lamp at the centre of the > reflector and open at the front; the other had a glass plate across > the mouth / front of the reflector. That glass is for UV reduction. > Don't know if it is special glass. I know I have a couple of floor lamps that use a 300W halogen bulb. they have a piece of tempered glass in front of the bulb. There was a recall of some that did not have the glass, but it was not UV but fire hazard that they were worrying about. The glass keep the bits of the bulb in place if it is broken while lit. There were some house fires caused by the lamps without the glass tipping over. -- Charles MacDonald Stittsville Ontario [email protected] Just Beyond the Fringe http://Charles.MacDonald.org/tubes No Microsoft Products were used in sending this e-mail. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/51A82387.4010900%40zeusprune.ca ?hl=en-GB. For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/!%26!AAAAAAAAAAAYAAAAAAAAAPDddShx705MuX20yCpp0vvCgAAAEAAAAGl8DKuWhUJFhokgnJJNQVABAAAAAA%3D%3D%40zeelandnet.nl?hl=en-GB. For more options, visit https://groups.google.com/groups/opt_out.
