On Sunday, August 13, 2017 at 5:14:11 PM UTC-4, Lynster wrote:
replying to Paintedcow, Lynster wrote:
I think you might be on to something with the "Current Draw" theory. I've got
several dusk/dawn/motion fixtures around the house and thought I'd save some
"long term" money by replacing the incandescent flood bulbs with LED flood
bulbs. Nope, bad idea... they don't turn off but go into a rapid flashing
(very irritating) mode. When motion is detected, they go on full, but then
when it times out, back to rapid flash. SO to throw more $$ away, I bought a
couple of new control heads that explicitly state on the box "Works with LED,
CFL, yada, yada..." Bad news, they do the same thing! I wonde if they test
this crap before they start selling it?

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If you can live with one incandescent in that circuit, it will probably work.
For example, if you have four 75W bulbs and replace 3 with LED, you've cut
the power usage by ~60% and it will probably work. Whether it's acceptable,
not noticeable to have one different, depends on the application. Or you
could even have one 40W bulb in there and it will likely work.