MAke sure you vent. these are cool, some you can put small computer fans inI am in the process of building a canopy to add t5s to my AI primes. I have 3 primes on a Reefer 250 and definitely have shadow problems even on small frags. The only way to see the color of the corals right now is to look top down, so hopefully the t5s allow me to see better color when looking through the glass.
http://veada.com/pontoon-boat-parts/air-flow-vent.html?gclid=CIPCi5ze_c4CFQQxaQodWhEK-w