21x23_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Reflective & Greenhouse Films The Ceramic HPS can take

The Ceramic HPS can take up to 20 minutes to get to full power

Color Temp / CRI 5500 /74 K/CRI

Coco and Hydro) and compatible with all growing mediums and watering methods

Makes 128 gallons of solution

21x23_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Reflective & Greenhouse Films The Ceramic HPS can takeNordic Pure Custom MERV 13 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