For rooms where we turn the light on and off quickly (e.g., in a pantry), does it make sense to use a CFL?
Turning on and off CFLs quickly can shorten the lifespan of the bulb depending on the frequency of use. CFLs work the best and are most energy efficient when left on for periods over 15 minutes. That said, visits to rooms lasting only a couple minutes will still be at least 70% more energy efficient, so CFLs are a smart choice for all your bulbs.