Plants use light to regulate their growth as well as for photosynthesis. Plants use red light and infrared to regulate internode length. They use blue light to track the sun. In this case the “sun”, the blue lights, are stationary so the plants are growing towards it.
Daylights are not the best fluorescents to use. since they supply almost no red light. A cool white, 4100k lamp or a 5000k will provide larger amounts of useable light for vegetative growth. Warm white 3000k lamps can be mixed with the cool whites during flowering. They should be placed in an alternate pattern so the plants get fairly even amounts of both spectrums.
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