I disagree I think given the right wavelengths and at least 5,000 lumens per sq ft you could get as good of yields if not better than HID. There are HO LEDs that can put out over 130 lumens per watt. Order some 2 or 3 watt LEDs and fill a board with them. Yes it will be very expensive so if you want to start cheap then don't go LED. If you are looking to make/save more money in the long run LEDs are the way to go.