Under-shelf small t5's - Anyone else use these?

[tcrane]

I've set up a new shelf in my office with three tiers of plants, but the plants get little direct light and I think in order for them to really bloom I'm going to need more light.

Found these on Amazon -

Amazon.com: Good Earth Lighting, Inc. G9712P-T5-WHES 12-1/2-Inch One-Light Fluorescent Light Fixture, White: Home Improvement

They are small, one-bulb florescent lights which people use for under-counter lighting. You can link them together easily, and they are the perfect size for the shelves I have.

I'm less sure about the output - anyone have an opinion on if the output from these is at all decent?

Ideally I'd be mounting one per shelf, just over the plants.

Thoughts?

-Tristan C