Question about Light, gallon, and Bio-Filter - Please Help. Thanks...

[TVR]

Hi:

I am having some confus of what to do. Please help. Thanks...
My Main tank is 54x25x23 (The main displayonly, excluded the overflow section) - I think it's about 130G, s/b less a bit, I could not remember exactly, I am at work right now. Plan is to have a mix reef (More softie though)
Light for it, I have the T5 8 tubes (with 4 daylight + 4 Atinic + 4 Moon) - When I bought, it said: 8x54W = 430W
My question is:

1. How's the Watt count? - By both daylight and atinic or just the daylight / atinic seperately?
2. If count for both, in mycase, it's total of 430W, is it good enough for my tank (as I intend to have a mix-reef)?
3. What really the ratio of W per G is recommended? - Oh, the Gallons in the ratio, does it count as the total container (of all main tank + Overflow section + Sump) or we just only "concern" the Main Display?
4. And very important: I heard light need to be changed the buld every year, how do you know exactly, some use 12hr per day, some use only 8 or even 6? - So the changing schedule is count on year or hr of use?
5. And Lastly: My friend told me to grow some micros or macro things in the Over-Flow section instead of only in the refugium. Is it safe to do that since this Over-Flow section is right next behind the main-display section and it make this idea sound scared to me?

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The reason I am asking because I heard (and from researches too) about many different "statements" about the W per G ratio and I am really confused now.
I just really dont want my pets tobe starved to death (talking about lighting ofcause) - My tank is actually 173G, but the main-display section is much less smaller.

Please help and thank you in advance.