A 1000w HPS light should be at least 2 feet away from the plants. You're burning your plants. Raise the light about a foot. Even 3 feet away with 1000w isn't too far. imp:
nickkap Reviewed by nickkap on . Making me nervous!yellowing leaves!! What is your experience level? (first timer, novice, experienced...)novice Your Equipment: .1) Type and wattage of lights. (MH, HPS, CFL's, tube fluorescents, LED's)1000 watt hps x2 .2) Distance from tops?1 1/2 foot .3) Reflector type? (cool tube set-up, bat wing, enclosed reflector, bare bulb...)radiant 8 inch, the ocho 8 inch .4) Is there a consistent fresh air supply? 2 fans .5) Do you have an exhaust fan and a circulation fan? no exhaust just circulation fan .6) What are the bulb Rating: 5