Nice find, Spuds. I should've mentioned that HD carries them but I've never seen them at my local HD stores yet. But that's where I buy my Philips LED bulbs.

On-off cycling is not an issue like it is for CFL lights.

Note that the packaging on my Philips bulbs did say that they are not suitable for photocell or timer use.

I don't think a timer should pose any problem, and I did use the 75W one on a lamp with a timer for a few days before moving it into the bathroom ceiling fixture. Perhaps that flickering phase on some photocell adapters just as it is getting dark may not agree with the electronics in an LED bulb.

For the latest generation of true incandescent lightbulb replacements, the 60W equivalent seems to be the sweet spot for most LED bulb manufacturers, and that's not bright enough for many applications. But my new Philips 75W is great, so we should start seeing more 75W versions in the near future.