UK experts have warned that CFL bulbs can trigger migraines, dizziness and loss of focus, as well as increased pain for those with lupus and can cause people with epilepsy to experience symptoms similar to the early stages of a fit. CFL's operate at high frequency using an electronic switching ballast to chop up the 120 volts -- that's how they are able to use less energy when compared to an old-style incandescent bulb. A typical operating frequency for an electronic ballast would be in the region of 20kHz to 100kHz, a frequency range known to produce adverse effects on...