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reflective material for growing weed

Reflective material for growing weed

Light meters will let you directly measure the change in brightness as you add reflective materials to your grow area, as well as adjust your lights so they are closer or further away from your plants to provide the precise amount of light you want.

Use one of the following recommended options to easily let heat escape the grow room…

Light meters are also useful for testing new or old grow lights to make sure the bulbs are as bright as they should be. As grow lights get older, they tend to produce less light over time, and a light meter can help you decide when it’s time to change your bulbs or upgrade your grow lights.

Kool Seal White Elastomeric Roof Coating (90% reflectivity)

Reflective material is not dirty or discolored – keep your walls clean!

Conclusion: Best Indoor Reflectivity Option

“Just Okay” Reflectivity Options

Walls should be flat with as few bends or turns as possible

The walls of your grow area:

The smartest paint choice is a high reflectivity flat white interior paint that’s designed to repel molds, fungi and mildews, and has little if any off-gassing volatiles in it.

Admittedly, it is tricky to attach Mylar to walls, and especially difficult to fix it to ceilings, because it’s a thin material that can easily rip, wrinkle or scratch. Mylar should be applied with the same amount of care as one would apply a window-tinting film on a car. The material must be absolutely flush to the wall, with no bends or wrinkles.

Flat White Paint

Growers using light-emitting diodes (LED) grow lights don’t have to worry about this, in part because the diodes are encased in a material that functions as a reflector.

Panda Film

Thieves use thermal detection drones and handheld devices to gather the same kind of data, which they then use to identify grow ops they can later rob.

Reflective material for growing weed

That is why growers usually use various reflective materials to reflect all that light back to their plants and to create the most growth possible from their artificial light sources.

White paint

You can expect up to 70% reflection but usually, these are just temporary solutions while you can get something much more reflective.


Use thin foil only if you have no other alternatives.