CFLS are the big ...lie. They are toxic (Mercury), they emit UV rays, They use considerably more power when used in short term use lighting, and they trigger migraines and seizures in some people. But, Nanny knows best.
One of the downsides with compact fluorescent light bulbs is the high start-up voltage that is required due to the ballast regulating the current. These light bulbs are therefore not as cost-efficient when used for shorter periods of time (switched on and off a lot) as opposed to being switched on for longer periods. The constant On/Off cycles also reduce the bulb's lifespan by as much a half, creating cost to purchase more bulbs more often and filling our landfills with heavy metal toxins. We've gone to LEDs as well, because I have severe head pain due to a previous carotid artery dissection, and can not tolerate the new lights at all. They are expensive, but we get deals at Costco.