[QUOITE="Feracon, post: 13188730, member: 952346"]Depends what your objective is. There's a lot to consider, more than just the lights themselves. For example, HPS lights generate a lot more heat, so you're going to need to spend more on climate management.
If you're going for pure weight--yield/watt efficiency--most ppl will tell you MH/HPS.
Low overhead and low upfront investment, look into CFL.
If you can afford some upfront investment, look into LED. Typically these generate the least heat of all light types.
Read through the entire beginners guide on growweedeasy.com and you'll start to have an idea of the kind of investment you're looking at to start your grow. Always find a light's (or any gear for that matter's) wattage draw from wall rating before buying it. A "300w" LED grow light wont draw anywhere near 300w from the wall.
I use a kill-a-watt power tester to test the draw of every element of my grow so I know exactly my total cost/month.
Any light type can grow great weed, provided you use the right configuration.[/QUOTE]
Yea I bought a 1000 watt king led plus and come to find out it's only pulling around 210 watts witch is really upsetting because I only have about 9 square feet and I'm going for max yield. Any ideas what I can't expect I have about 9 plants