Quote Originally Posted by oldmac
Hey Dutch,

Recently while looking for a CMH bulb, one of the mfgs (don't remeber which site) was stating they had "new and improved" glass envelope that cut down the amount of radiated UV.

How is that an improvement?
Everything that I know about CMH bulbs is in here...(and the ICMag link included)...you should be able to read it all...in two or three days......
http://boards.cannabis.com/indoor-li...-ballasts.html