I found a used 6 bulb Tek light for my 75 gallon tank and need to replace the bulbs. What do you all suggest? I have no idea what bulbs are in it now but, I think they are a bit too bright for the tank. I have a few soft corals in there so, would like to promote their growth and health. Thanks for all of your help, I really appreciate your guidance with this new hobby. 
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View attachment 3427