Let me do some research on this light and get back to you. I just read a quick review and this fixture has no cooling system so that means I will be running through bulbs. Maybe you can give me some insight on weather or not I should get a 4 or 6 bulb feature? I getting a 40 breeder due to space issues and wondering if a 6 bulb would be to much for that tank? I plan on having mainly SPS but would also like to house some LPS (torch, Duncan ect...) dont want to burn any coral so any thoughts would be helpful. thanks ps the system does not let me PM until I have 10 post. idk why