I may not be able to grow tomatoes (as quickly as I want) in my greenhouse thanks to the lack of sunlight, but I have a room upstairs that I use mainly for starting seedlings. If I remove a bench I use in early spring to hold seed trays, I will have plenty of room to raise 28 tomato plants. If they do well, and I am experimenting with different types, they should yield between 750-1000 pounds of maters during a three-month post transplant time. The key will be if I am able to deliver ~27,000 lumens to the plants.

There is a 400 watt HPS bulb that delivers 55,000 lumens and is suppose to cover a 3x3' area (minimum). That would mean running five bulbs for 15 hrs./day for 90 days or a cost of $270. But at $1.50/lb. for vine ripened tomatoes in December and January, that would mean income of $1,100-1,500.

I really look forward to getting the light - I will have six small transplants to try it on.

Mike