LIGHT QUESTIONS.

[RICKY81]

ok so i have my light for about 1 year already, and know that they recommend to change them every year. i currently have the Outer Orbitz 150 watt PowerPaq 10000°K HQI double ended bulb(s) and Dual 460nm/420nm Actinic square pin compact fluorescent bulbs.48"560 watt: 2-250 watt HQI; 2-130 watt6lunar light. a few questions that i have are:

> i want to upgrade my mH from 150w to 250w but do i need to upgrade my ballast.
> currently have 560 watts and want go up to 760 watts, is that too much, and how much is recommended.
>what is the difference from the lights:
420/460 nm 130w
6700k/10,000k 130w
Actinic 460 nm 130w
Actinic white bulbs or 50/50

I have a 75 gal mixed reef tank.

any suggestions and/or recommendations will be appreciated thanks for taking the time to read and provide info.