Grodan Pro Delta 6.5 Block, 4" x 4" x 2.5", case of 216, Commercial spl_hgc It is suitable for both

It is suitable for both indoor and outdoor growing but is most recommended for indoor use for crops requiring a lot of water

All solarMAX lamps are manufactured in Germany by an ISO certified factory with over 40 years experience in HPS and MH lamp technology

2 on/off settings per day

Features slotted housing and 4 piece white reflector that distributes light very broadly

• 20 Amp Ballast

Grodan Pro Delta 6.5 Block, 4" x 4" x 2.5", case of 216, Commercial spl_hgc It is suitable for bothGrodan Stonewool (rockwool) is made from molten rock spun into cotton candy like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different types of fibers. The purpose is to support the requirement of the plant in the different plant stages. Grodan has a tremendous capacity for absorbing nutrient solution while retaining plenty of oxygen