tungsten-halogen quartz safety
Posted 18 February 2011 - 09:13 PM
Posted 18 February 2011 - 10:02 PM
I was recently loaned a decent amount of mole-richerdson lights and one of them is a mickey-mole. It uses a halogen bulb and I was wondering about the safety of that. I have heard that halogen bulbs need to be shielded with UV glass, and the light I have is just open faced.
While Halogen lamps do put out some UV, I think you're confusing them with HMI globes which put out a dangerous amount.
A standard incandescent lamp emits about 75 micro watts per lumen(µW/lm) of UV, and unshielded halogen emits 100- 200 µW/lm. Daylight, meanwhile, emits 300 - 600 µW/lm.
Chances are the only way you'll get burned is if you touch the light without gloves. don't do it.
Often there's safety mesh so if a globe does blow it doesn't spray hot glass over the talent.
Posted 18 February 2011 - 10:53 PM
Posted 19 February 2011 - 02:16 AM
Posted 25 February 2011 - 11:12 AM
Posted 25 February 2011 - 02:13 PM
Though not terribly common, all bulb types explode once in a while.
The way halogens explode is if the filament breaks and they start arcing. I've had that happen when a stand fell over. The light goes way up in color temperature and gets brighter. Pressure builds up inside the bulb until it bursts with an anemic pop, scattering a few particles maybe two or three feet. If you ever get an arcing tungsten, best to just step away from it and wait a few seconds for it to pop. That'll be safer than handling the pressurized globe after it cools.
The other old quartz rule is, of course, never get fingerprints or any kind of schmutz on the globe, as it'll absorb heat and melt the quartz.
Posted 28 February 2011 - 01:19 PM
Posted 28 February 2011 - 06:08 PM
Edited by J. Lamar King, 28 February 2011 - 06:10 PM.