After buying 3 shoplights and hanging tow together to cover as much of trays as possible, I was still getting some leaning in on the edges from the seedlings. I coulnt fit 3 lights side by side so I could turn my trays sideways. So after some researching web and youtube, i made one big enough to cover 3 trays, with reflecting sidewalls.Plus it only cost me under $15. the shoplights were costing about $29 each for the 2 bulb T8's, 4 ft long. i am hoping four 60 watt bulbs will be enough with the walls covered with foil. we shall see,
tammy

Here is a link that might be useful: growlight