The bulbs are similar in design to fluorescent bulbs
but emit much more radiant energy. For example,
three 180 watt LPS lamps can produce as much
radiant energy as eight 150 watt fluorescent lamps.
Average life is about 18,000 hours. The lamp will
restart immediately after a power interruption.
Because less heat is generated, LPS lamps can be
placed closer to plants than HPS lamps.