I have a 30 foot by 126 foot green house where I grow hydroponic lettuce. How many of your L.E.D. Lights would it take to cover my green house and what do they cost per unit? Can I get a discount? I have never used a L.E.D. light, do you do samples so that I can see if it works or not? If so and the price is reasonable I will stock all of my green houses with them.