"Do not touch the Halogen bulb surface or inside reflectors
with your bare hands. Oils from skin can lead to breakage
or shorten the life of the lamp. Use clean gloves or lint
free cloth for installation and removal."
http://www.ushio.com/safety.htm"Bulb Care: Do not handle the glass part of a halogen bulb.
The oil from your hands or any other residue on the glass
can cause the bulb to burn out prematurely. If you
accidentally touch the glass clean it immediately with
isopropyl alcohol and a lint-free cloth."
http://www.toponemall.com/94310wutonmlihgedba.html"Do not touch the new bulb with your fingers; using a
cloth to hold the bulb, gently push it into the socket.
If there is any doubt that the bulb may have been
contaminated by your touch, you should clean the bulb
before its first use. Take a clean cloth dipped in a
small amount of rubbing/isopropyl alcohol and gently
brush off the bulb surface."
http://www.halcyon.net/manuals/helios-p ... nual03.pdf