Help - Florescent Grow Setup for Seedlings / Cuttings

The below florescent grow setup for seedlings and cuttings uses one T5 high output bulb (4' in length, 4900 lumens). Is this enough light to properly grow seedlings and cuttings until they are ready for the vegging room?

I plan to place plants under the light, 4 per square foot.

Please feel free to suggest alternate setups or a stronger bulb(s) if I need them. I'm just a raw beginner.

http://www.greenhousemegastore.com/Fluorescent-Grow-Light-System/productinfo/GL-GTS/
 
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