![]() LED lights have been lacking for years, until now. For best results use an MH for growth and an HPS for the flower phase. We have also found that HPS gives a marginally better yield if it used for the bloom phase and the MH performs slightly better during the growth phase. In our trials, we found that HPS (versus MH), when used for an entire crop cycle, slightly but noticeably out performed MH. If using “ cool tubes” and LED Lights then lights may be run much closer! What is the best light to use, High Pressure Sodium (HPS) or Metal Halide (MH)? The gap should be approx 40cm for 400W, 40-60cm for 600W and 60cm for 1000W globes.Īlso a fan blowing gently between the plant and globe will help with heat building up. What distance between light and plant is best? Last Updated: MAY 2021 How long should I run my lights ?įlowering phase = 12 hrs per day.
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