I saw these at Lowes/Home Depot. What do you think? They have clips on the back too which makes hanging a little more convenient. I was thinking of bending in the middle a little so it wraps my lights and maybe putting two side-by-side to utilize the clips and also cover more light area. I'm doing a single bagseed cfl grow with three-26/100w bulbs (for now) and wanted to go up to eight eventually. Any ideas/objections/Exo you're an idiot that will never work? The only thing I would be concerned about are the grooves bouncing the light a certain way and harming the plant. I can probably find them cheaper at walmart or something too.
That paint tray certainly will work better than no reflector at all. And to all, do not use emergency blankets, they are not made for reflecting light and don't do a great job of it. If you hold them up to the light you can see right through it -- light passing through certainly is light not reflected. There is a reason the good mylar you want to use costs $20-$25 for a roll while these space blankets costs $2-$3. You want horticulture-grade mylar that has a mirror finish. If not, then a flat bright white surface reflects light better than emergency blankets.
Cool, thanks man! I have "white-ish" walls (looks flat white, not sure exactly what it is though) in a 2'x2'x6' closet, and it gets a little chilly in there (especially with the lights off). I was thinking of putting an emergency blanket around the wall where the pot is to help with reflection and insulation, since it's up against the wall it should have a better effect, right?
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