While research highlights the energy and cost efficiency of LEDs, experts warn that they may also be one of the most harmful ...

Vesper said the LED bulbs he uses in schools these days are incompatible with the systems that power fluorescent bulbs. That means he’s paying more for bulbs that’ often perform poorly.

If you like the light, buy more. If you turn that fixture on and off a lot, use an LED. On/off cycling will shorten the life of a CFL. Instant light is essential, so LEDs are the better choice for ...