What are disadvantages of CFLs?
CFLs are usually physically larger than incandescent lamps. The higher the wattage, the bigger the size. Thanks to the technology in recent years, newer models employing smaller and lighter electronic ballast make them only slightly larger than the incandescents they replace. There comes also a few of more compact size CFLs in the market to eliminate the weakness. CFLs are designed to operate within a specific temperature range. Temperatures below the range cause reduced luminous output. Most are for indoor use, but there are quite some models available for outdoor use(e.g. can be used at the low temperature of -20C). In this case, CFLs should be installed in enclosed fixtures to minimize the adverse effects of colder temperatutes and wet conditions.
