cct 5000 - 8000 color deep blue Effect encourages excellent leaf and stem growth---- cct 4000 - 5000 color light blue effect encourages good leaf and stem growth----- cct 4000 color nuetral white effect promotes normal growth-------- cct 3700 - 4000 color warm neutral effect promotes rapid growth -------cct 3000 - 3700 color warmer yellow neutral effect highly active photosynthesis for all stages of growth------------ cct 1500 -3000 color hot orange or red effect promotes flowering