What are the best lights for indoors in a soiless mix

Hi everyone:
I want some opinions and facts on the best lights indoors LED, MH, or HPS and If choosing an LED What are the best types? Ive noticed that their are alot of choices these days as Technology has advanced! and also what is the best and cheapest way of Co2 delivery in a closet area approx. 3deep X 5 wide X 7 tall ??? Using PRO-MIX ?
Thanx in advance:
Deedra

use the hps. led tech isnt that greeat yet, from what ive rea

Get the hps lighting sytem with a metal halide conversion bulb. LED is good but the technology isn't quite up to par yet, if you ask me.

http://cgi.ebay.ca/DIGITAL-OPEN-REFLECTOR-GROW-LIGHT-600-WATT-HPS-MH-600W_W0QQitemZ320480305717QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item4a9e1d6235

best thing i've ever bought on ebay