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The PowerVEG 633 grow light is specifically intended for rejuvenating
plant growth cells, stimulating stem growth and directing phytochrome
reversibility, which is crucial for photosynthesis, fruit, and flower
regulation. The name “633” refers to the area of the light spectrum
produced by this lamp. The PowerVEG 633 light encourages vertical plant
growth and helps to expand leaf size. It produces a red spectral light
that prepares your plants for the fruiting and flowering stages of
growth.