An important aspect to remember is, if you are in cold climates and require heating as a result. The inefficient byproduct of lights is actually useful. So no matter what light you get, you are getting 100% energy efficiency from your light source as both the light and heat are being utilized. In this case, light efficiency is of no concern where by whatever heat is reduced from lowered efficiency, has to be replaced with electrical heating.
This of course is invalid when there is too much heat.