22x23x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Reflectors & Grow Lights Rounding out the system is

Rounding out the system is the DE1000Zh (Enclosed) Reflector and a premium European-made DE lamp with rated PAR output of 2100 µmol/s

*Correlated color temperatures will fluctuate depending on which bulb is purchased

iLS4- 121s or iLS4-241

Top·Max™s a 100% organic flowering strengtheners which has the threefold purpose of increasing the actual size and weight of clusters of flowers

Outside Dimensions: 35 3/4" x 35 3/4" x 3 3/4"

22x23x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Reflectors & Grow Lights Rounding out the system isNordic Pure Custom MERV 8 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition