Lynne wrote:

Reverse side of mylar gift-wrap works well too - and water repellant.

I was thinking of trying an old Venetian blind. You can adjust the vanes
to reflect light to where it's needed. It's also open, which should allow
better air circulation.


"Dr. Rev. Chuck, M.D. P.A." wrote

A matte white cardboard
panel in back of the seed trays will reflect otherwise wasted light
back to where it can do good.