The Growers Choice 4K 600W SE is a 600-watt, single-ended metal halide lamp specifically designed for growing spaces. Its 4000K color temperature provides a slightly warmer spectrum than typical metal halide bulbs, making it highly versatile for use during both vegetative growth and the early to mid-flowering stages of plants. This unique spectral output is engineered to encourage robust, healthy plant development and can significantly enhance resin production due to its UV spectral output. Constructed with high-quality quartz glass, the bulb ensures consistent spectral output and PAR production throughout its lifespan. It delivers 60,000 lumens at 100 hours with a lumen per watt efficiency of 100, and a photon flux of 800 µmol/s. But if this lighting system is too powerful for your grow space, then take a look at the ROI-E420 system, or the smaller 10K 1000W SE for better light management.