6mm Solar Cool Gray 6mil Low E PPG

[peterng]

So I've got a great price on these 2' x 4' glass panels.

http://corporateportal.ppg.com/NR/rd...learthtone.pdf

That web site has the specs on this glass in the Table of Performance Values.

It indicates the glass has a visible transmittance of 17%.

I am trying to figure out if this glass is feasible to put in the roof of a greenhouse (45degree angle lean to w/ 4' knee wall type) I can get 20 panels for $25 each/ normally they are $27 per sq. foot.

What do you think, is this a waste of time. It looks to me as though supplemental lighting will be needed for seedlings, which would be the primary purpose.

Thanks,
Pete

[Dorothy]