The lighting that I'm reading about, CFL? is this a power compact bulb? If so what are the prices to replace them per bulb? I'm seeing alot of bulbs that you would use over a saltwater reef tank. I'm just wondering if the prices are radically different between the hobbies. T-5 VHO bulbs are good for 9-12 months over a reef then the spectrum starts to shift. Is the time frame the same for cp's?