I am going to experiment with my first MH (HQI, what does that stand for again?) setup. I purchased a double-ended 250W lamp with ballast from "fishneedit" on eBay to start with.
- How much heat would this 250W bulb likely generate? What about 70W, or 150W? (Not sure how to qualify this, actually, other than subjectively...)
- Are the fixtures, ballasts and/or bulbs heat sensitive? (That is, if there are hot days of 90+F where I am, will this cause issues with the light itself?)
- Would the 250 (or 150) be "ok"/"too much"/"just right" to use over a 36x24x24 (LxWxH) or 36x24x16 pressurized co2 tank?
- Are there any good rules of thumb to keep in mind when first using an MH setup?
I realize that the height can be raised or lowered to adjust PAR levels. What is a good starting height?