Well its the blue and red spectrum otherwise theyd make other speced bulbs no? it will reduce the heat on the plants he'll be able to put it closer but the only way it will reduce heat more is if you manage to exhausted the air from the space between the light and class. see if you can diy a duct into there or something with a cheap vent, worth a think about.
my 2 cent to the topic.
edit: depending on how his reflector looks you could get a cheap flimsy duct that you get around the place sqeeze it inbetween the glass and the reflector top and hook it up to a vent thats sucking out the air from under the light leave the other side of the reflector open for fresh cooler air(hot air from the tent) or have it hook up to the carbon filter as the air will smell. which i just realized haha or you'll be sucking out weed oddered air