The Planted Tank Forum - View Single Post - DIY PAR38 LED Track Light
View Single Post
post #7 of (permalink) Old 12-06-2011, 06:16 AM
Planted Tank Guru
Hoppy's Avatar
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 19,673
You can use Lux meters for a reasonably accurate PAR reading: Of course this has to be used out in the air, not underwater, but it would tell you about how much PAR you will get in water too (about 10-20% more than in air).

Hoppy is online now  
For the best viewing experience please update your browser to Google Chrome