On 2013-10-20, Graham wrote:

On Sun, 20 Oct 2013 17:20:39 +0100, John Rumm
wrote:

Unless you need "always on" outside lights there is little point in
using CFLs for that application. Filament lamps give instant on at any
temperature, and good light output. In applications where the total run
time per year is relatively low, then the cost of running them becomes
far less significant.

The problem I find is failure due to wind vibration of the fitting.
I have three spiral CFLs in the coach lamps outside, they have
reasonable switch-on brightness and CFLs outside seem to last forever.

I have CFLs in all the outside lights & get similar results
(reasonable but instant switch-on & very long life).