T5 on Cadlight

I have 2 seperate questions. Heres goes, please try to take a shot at them

1: I have a spare 15 watt light like the ones that come with freshwater tanks. If i were to put an actinic bulb in it, could my tank be "technically" be considered 15 watts brighter? That would put it up to 71 watts. To rephrase that, could that light contribute to what corals i can keep? if so and if i can use the light beneficially, Could i keep sps or at least montiporas with that amount of light? The lights that the CADLIGHT origionally comes with is 56 watt t5SO, not HO. So obviously if i added that light, it would be up to 71 watts

2: if i cant use that light and it wont contribute, if i were to buy a 3rd 28 watt t5SO fixture from cadlights would that be enough for sps? montiporas?

thanks,
ryan

 

Hey bud--That light may cause algae blooms--be careful.