It does say in the description that there is tempered glass there. I think it's the same as a cooltube, just bigger :jointsmile:

"Air passes efficiently through both 6" flanged ends of the reflector directly over the lamp for maximum inline cooling eliminating excess heat. Of particular interest to growers using supplemental CO2. The reflector is a self-contained unit which includes built in 6" flanges and a tempered glass safety lens."