[SML] lights

[Don Taco]

 I've been curious about something, and I just bet that several of you know the answer.

   I recall, back in the day, when fluorescent lighting was new, various and conflicting advice about what it cost to turn them on and off, and how long you could let them run at less cost than re-starting them, and so on. I never did feel like I had a clear answer.

  But what about LEDs? Should you turn them off as much as possible to keep costs down? Let them run for long periods once you switch them on? What is most cost-effective? 

  Thanks again!