Here's a step-by-step guide to perform these calculations: Step 1: Determine the Required Illumination The required illumination level is usually measured in lux (lumens per square meter).
This manifold is made for 20 Tubes. </LI></UL></DIV><br><UL><br><LI>Dimensions : 59" x 80" x 6-1/4" <br><LI>Weight (Empty) : 135 lbs. <br><LI>Manifold's Capacity :. 12 Gallons <br><LI>Connections : 3/4" Copper </LI></UL></FONT>.