20x20x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon 6 Pack air-purification the DE Metal Halide lamp

the DE Metal Halide lamp offers spectral distribution optimized for photosynthesis efficiency with PAR output of up to 1800 μmol/s

It is also oil-free and therefore does not clog the stomata

Many growers pay for multiple products and still don’t see the improvement that Z7 can do all by itself

The dimmer knob allows growers to change the brightness level of both the veg and bloom lights from 0-100% allowing you to obtain perfect growth performance

and pollinators when applied as directed

20x20x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon 6 Pack air-purification the DE Metal Halide lampImportant Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air conditioner filter. It's best if you measure your air filter for the EXACT size and compare it to our "Actual Size" and then you can be sure your A C air filter fits! With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer. If you are replacing a 4 3 8 depth 20x20x4 filter