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Accessories like light meters and replacement parts like
ballast or reflector hoods can save you money. For example
light meters are
available for measuring the light intensity. The most common
light meters are calibrated in foot candles or lux (10.76
foot candles). Foot candles should be measured at the
growing level of the plants. Research your particular type
of plant and find out what the optimum foot candles are for
growth or propagation. Adjust your light height accordingly
so that the the foot candles are correct at the growing
level when measured with the light meter.
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