i want to thank irish for his unbiased results and attempts to clear the confusion and bring some light to the led controversy. kudos to you. i do have a question for you since you have so much led experience now. i am considering either using a single 1000 watt hid light or approximately 1000 watts of leds. watt for watt do you think the leds could produce the same yield as hid? my concern isnt the expense of led lights over halide. i have serious concerns using a 1000 watt halide and the long term expenses associated with cooling and ventilation. i am also concerned with noise. a 1000 watt bulb needs some serious ventilation as well. your thoughts are greatly appreciated