Actually you want metal halide and high presure sodium. Metal Halide provides the blue spectrum good for vegging and High Presure Sodium provides a red spectum better for flowering. They have conversion bulbs so you dont have to get a switchable ballast but thats what i would recomend. The wattage of your setup really depends on the size of the enclosure you intend to use. You can look on your power bill and see how much your paying per kilawatt hour. A 1000w lamp uses one kilawatt per hour it is on. I use a 1000w air cooled fixture with 440cfm of air flowing through light, really helps with heat. I have a 10x5x7 enclosure and have to use a 12,000btu window A/C and 2 10inch turbo fans to keep the room between 70 and 80 deg with the light on. Hope some of this helps. I dont have any experience with flourecents or LED's, sorry.:rasta: