Originally Posted by nap
can you point to where the "traditional" lamp is being phased out?
The US is not requiring a cessation in production of incandescent lamps. It is enforcing an energy efficiency requirement which, as I understand it, at least one manufacture already has the ability to produce incandescents that exceed the requirements.
as to changing codes;
there are already changes in building codes in place that require things like lights automatically dimming or turning off after a prescribed period of time with no human presence. They are also doing things like outlawing magnetic ballasts in some cases and requiring the use of electronic ballasts due to improved efficiency. Those rules have been in place for several years already.
These things primarily affects commercial buildings, which do not really use much incandescent lamps. I'm not sure how restaurants and apparel retailers. The latter shouldn't be affected too much as it doesn't affect MR16 and other smaller lamps.
it only affects larger reflector lamps and 40-100W standard "regular light bulbs" with the legislation affecting 100W next year, 75W the following and eventually down to 40W lamps.
They're not banning it, but effectively, traditionally built lamps are banned. They could use technology like halogen lamp within bulb infrared reflective capsule, which raises efficacy, but the price as well. So, it would not be a total surprise when compliant incandescent lamps cost $5-6 ea while having a life of only 1000 to 2000 hours.
Dimming is going to be difficult with anything other than filament lamps. We have the technology to effectively dim the output of fluorescent lamps. Lutron already sells one that dims down to 1/2% of full output, at astronomical cost.
Aside from higher cost, fluorescent lamps can be dimmed to modulate output, but the visual and aesthetic effect is not the same as incandescent lamps which change in color from bright yellow to reddish orange with dimming. The color remains relatively constant.