Stop mandating cfl
While a separate tube & ballast has one obvious advantage, the practical implementation of these has proven disadvantageous in terms of cost, convenience and flexibility.
Philips produced the first commercially successful CFL, the SL18 in 1980.CFLs without filaments are immune to this issue, but cost more, and aren't often seen in supermarkets etc.CFLs work fine in place of linear fluorescent, but are usually not as energy efficient as them, so replacement doesn't yield any further savings.CFLS with an outer glass envelope over the tube don't cause this. Stick lamps give much more light out sideways than end on.This is an advantage with pendant fittings, where it produces more even light spread.First the output of both fillament and CFLs reduces over time, but CFL output reduces a lot more than do filaments.
Hence a 1000 lumen rated CFL isn't entirely equivalent to a 1000 lumen filament lamp.
Linear fluorescent are the most energy efficient type of lighting normally used in homes. Ordinary CFLs work on a dimmer when left set to full, but if left on reduced setting the CFL's input resistor is likely to fry, ending bulb life.
There are 2 types of dimmable CFLs, those operated by a dimmer, and those that select differing brightness levels according to switch operation patterns. CFLs don't look anywhere near as nice, and don't produce the prismatic colour effects of filament lamps.
It makes them ill suited to fittings that can only make good use of light from the front of the lamp, such as most spotlight fittings, and some downlights.
In exceptional cases a CFL flashes occasionally when switched off.
CFL output varies with viewing angle by around 3:1, with maximum at the side, and minimum at the top.