well lowes and hd do have them but they are the flood light kind i got the 70 watt from lowes but on hd website they got some 400 watters at hd
Find a hydroponic store near you if you dont want to order from the interenet. There are some sites that have great prices though. Also, try asking the gardening center and Home Depot if they can order lights for you.
oh yea lowes can order for u but i asked for a price on the ballast of a 400 watt and it was going to be like 253
I agree to look online at sites like HTG Supply. Home Depot does carry HPS, in the security lighting section, but relatively low wattage and you may need to do some re-wiring to separate the ballast from the lamp (for heat issues).