this question doesn't supply enough info about you would be doing with this light to make a reasonable decision . but with a little research I quickly came to conclude that in "most" reef applications this light is most lightly a downgrade in the amount of usable light versus your t5 . that is depending on how many bulbs, what kind of bulbs as well as the type of ballast your using. just because its "led" does not make it a better light.