Four T-12 20w 24" Flo's in 29"x19x72?

Will four 24" 20w T-12 fluorescent lights be supple for 6 plants to veg?

My Greenhouse is one of these Juliana Growing Racks

Ive removed all the racks and installed two fixtures each housing 2x 24" 20w grow lights and lined the inside with reflective mylar (cheap-0 emergency blanket hehe)

The fixtures fill up the greenhouse well and are on adjustable chains to lower and raise them...

This should be sufficient for vegging 6 plant wont it?

I think it will work...but eventually you might think about upgrading the lights later on and I think you will be way more pleased.

Thanks ya it seems like a lot of light...

so ya two of these fixtures:
Each house 2x 24" T12 bulbs 20watt
Lithonia Lighting - The best value in lighting  -- Product Catalog

I have 4 bulbs..
Two are these Sylvania Plant and Aquarium
mySylvania Product Catalog

the other two are these OTT LITE Plant
Wheatgrasskits.com- Ott Lite Natural Full Spectrum Lighting Indoor Grow Lights (24" tubes at bottom of the page)

I just added 2 more 90w CFL's for kicks...

I think you would be better buying regular 6500k t8 bulbs(5$) and put them in the same fixture.... I got almost no growth at all when i was using the aquarium and plant bulbs....