I am investigating options for lighting in my indoor growing area. I saw that another member used these Fluorex flood lights. Home Depot still sells them and it is rated to light a 40' X 40' area. My shelves are only 20" X 48", so this might be a bit much, but a possibility for the future greenhouse due to our very cloudy days. Today I measured about 10k lumens outside, or about 1000 foot candles. I was wondering if anyone had experience using these bulbs. There is no rating for lumens output. Also if you look at Orchid Karma's webpage, she states "in reality the chlorophyll red peak occurs at 660nm, 4400K". If that is so, then why are we trying to get bulbs with 5000 to 6500k spectrum? Also, how important is it to have the lower end included at say 2,700 k to initiate blooming? I presently am mixing the two at half and half, but is this not needed?