I jumped on the CFL bandwagon from the early days and much of the same issues that plagued these devices then are still very prevalent today.  Early on the biggest problem was with CFL’s turning into crispy critters, one such erupted so quickly the putrid toxic smoke overcame my wife in a few seconds and cutting the electric supply did not extinguish the fire.  Many such fire incidents followed, some resulting in serious damages and thus putting an end to even considering CFL’s for many years to follow.  CFL’s are prone to ignition and premature failure in applications where the ambient temperature falls below 60°F.  CFL’s require several minutes to achieve full light output making them worthless for any application requiring instant full output such as emergency lighting system.  The biggest issue with both CFL’s & LED’s is that the “measured” light output does not coincide with the amount and/or spectrum of light perceived by the human eye nor does the light itself traverse the same distance as that of other light sources.  In areas where a 60w incandescent lamp provides sufficient illumination, the same application typically requires a CFL with a minimum 100w equivalent output.  Light travel distance is another point of concern since a 60w incandescent will provide an acceptable light level at a distance roughly 30% greater than what a 100w equivalent CFL is capable of.  The latter may seem inconsequential in the typical residential application but commercial buildings designed around incandescent lamps often cannot be changed to CFL’s without requiring a complete lighting re-design and often adding numerous additional fixtures.  In applications where the fixture height exceeds 20 feet, a 150w equivalent CFL does not provide sufficient floor-level illumination as is accomplished with a 100w incandescent.  Typical high-bay applications require replacing a single 100w incandescent with three 42w (150w equivalent) CFL’s which means adding two additional fixtures and consuming 126w of utility power – no ROI is possible.  LED”s are even further limited on the production of light that is usable to the human eye, the distance at which the light carries and the usable beam width.  A typical intermediate bay height application requires two 120w LED fixtures using a total of 240w utility power at a cost of $1240 as compared to a single 250w HID fixture costing $175 – with an actual energy savings of just 14w, one will never see an ROI.  I don't know about others but my clients want to see real ROI figures and data based on their application to support those numbers. 

Mark