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Fluorescent or metal halide lighting is best for clones and seedlings. Metal halides are recommended for vegetative growth due to their enhanced blue spectrum which encourages bushier, more compact growth. High pressure sodium lights are better suited for flowering, but either can be used for the entire cycle with favorable results.
Durotest Aquatinic 7500K bulbs are my choice for cloning, seedling and mother plant lighting, for which they keep growth sturdy and compact. I switch to SunMaster Cool Deluxe metal halide during the early vegetative stage through the stretching phase of early flowering to keep the plant compact. I finish off the plant cycle with Hortilux high pressure sodium lighting. They are extremely bright and efficient with superior dispersion.
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