There is no cooling fans on these. If you want to have one you can mount a computer fan inside the fixture. I just took off the splash shield and make sure the ceiling fan in the room is on.Pete, I have been thinking LED for my 40b, but after your post I have changed my mind. How loud is the cooling fan on this? Do you have any pics with this T5 mounted on your 40b? Thanks for the idea!!
This is an old pic of my 40
This is my 29 with the 24" model of that same light
