How do you guys mesure the amount of lighting?

Is it whatts or lumens?

and about how many of (either) would you need to support 14 plants?

Dose anybody know where to obtain mylar in the US? or are there any other reflective materials here in the USA that work well? I know tinfoil is a nono.

thanks for any info! I really appreciate all the help!
Whitemare Reviewed by Whitemare on . Watts or Lumens? How do you guys mesure the amount of lighting? Is it whatts or lumens? and about how many of (either) would you need to support 14 plants? Dose anybody know where to obtain mylar in the US? or are there any other reflective materials here in the USA that work well? I know tinfoil is a nono. thanks for any info! I really appreciate all the help! Rating: 5