"thank you for all you kind help and comments, here is a latest pic - I am using 4x150 watt compact flourecents and 4x60 watt of those horrible daylight bulbs.
Yes it is tin foil, prolly bad.
Is it natural for the bottom leaves to die off like that?"

When u say daylight bulbs you mean flourscent right? because noraml incandesant lights (the regualr bulbs) are terrible for growing.