Growers Choice DE 600W HPS 2K Grow Lamp | 1050 µmol/s | 2000K Bloom Trays + Domes Weeks one and two do

Weeks one and two do not need it

Sold as a Single Unit: One holder per listing

That cutoff shuts the pump off on its own when you run a float valve

or any banned plant growth regulators

Growers Choice DE 600W HPS 2K Grow Lamp | 1050 µmol/s | 2000K Bloom Trays + Domes Weeks one and two doGrowers Choice DE 600W HPS 2K Lamp: 1050 mol s Bloom Output The Growers Choice DE 600W HPS runs at 2000K with 1050 mol s photon flux and 90,000 lumens of initial output at 150 lm W serious numbers for a 600W lamp that put it in the output range some 1000W single ended fixtures struggle to match. The spectral output peaks heavily in the red and far red range, mimicking the color temperature of autumn sunlight and stimulating the metabolic activity that