20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 10 Pleated Plus Carbon 1 Pack Reflectors & Grow Lights resulting in stronger

resulting in stronger

this trap is energy independent and will not need other user commands

PPF: up to 2100 μmol/s

vegetative as well as flower stages

Used at regular intervals throughout the flowering stage

20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 10 Pleated Plus Carbon 1 Pack Reflectors & Grow Lights resulting in strongerImportant 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. We also carry 4 7 8 and 5 1 4 inch depth filters,