Thanks for super prompt response. You are truly a wealth of information! Just to give you a quick rundown... I am currently using a 1000Watt MH lamp during veg and then 1000Watt HPS during flowering. Also, inducing CO2 at 1200PPM. (I have noticed an incredible difference in weight compared to last harvest not having CO2) One concern is definitely my yield amounts but also my electrical bill. These are really the primary reasons for my switchover to LED. Your yields are incredible! Because heat is no longer an issue with LED do I still need to be worried about the 21" spacing between the plants and light? Regardless I am definitely going LED... Will the price remain at 1099 for the 318W?