4' x 50' 7mil on white Mylar Environmental Controllers The media's expansion is due

The media's expansion is due to the presence of two to six percent combined water in the crude perlite rock

Concentrated

Active Air Dehumidifiers are designed to provide optimal humidity control in your growing environment

Contains precision gasses for enhanced spectral output

but they will do it quicker than common sodium bulbs

4' x 50' 7mil on white Mylar Environmental Controllers The media's expansion is dueWhat would be " lost" light, now is utilized for maximum efficiency. 7mil thick mylar with white PE film backing for added strength. This product will not tear easily like other mylars. Attach to any surface for ultimate light uniformity. Get creative: mount to walls, poles, pots. Highly reflective. Use either side. Double the thickness of any other type on the market. 98% reflective Optimum light return for your plants Excellent light blocking