View Single Post
Old 03-18-2002, 05:56 PM   #7 (permalink)
solarmeter
 
Join Date: Nov 13 2001
Location: MI
Posts: 861
Rep Power: 23 solarmeter has a spectacular aura about solarmeter has a spectacular aura about
The only valid way to compare lamps is MED/hr, which is related to max timer interval (Te). Yes higher % B 100W lamps are generally more effective ("hot") than low % B. But a 160W with less % B can be and often is more effective, due to more total (A+B) irradiance.

MED/hr takes in to account lamp weighted UVR erythemal "power", and is almost always inversely proportional to Te time. Standardized lamp/bed testing protocol has been recommended by TSO and others to the FDA, and someday soon more of the mystery should be removed from this whole subject.

Steve
solarmeter is offline   Reply With Quote