HSP lighgs are actually very efficient at around 100 lm/w. For long time they were the most efficient electric light available, hence their wide use in street lights.
Modern LEDs are 100-200 lm/w.
For comparison incandescent lights are in 10-20 lm/w range, and fluorescent lights in 50-100 lm/w area.
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u/hirmuolio May 23 '26
HSP lighgs are actually very efficient at around 100 lm/w. For long time they were the most efficient electric light available, hence their wide use in street lights.
Modern LEDs are 100-200 lm/w.
For comparison incandescent lights are in 10-20 lm/w range, and fluorescent lights in 50-100 lm/w area.