general LED light bulb replacement question(s)

[Lynx_Arc]

The smaller base is probably for chandeliers and vanity lighting. Personally I wouldn't bother buying CFLs these days unless they are cheaper and you just need to fill a socket with a bulb... any bulb. I still have over a dozen incan bulbs bought 15-20 years ago when you could get a 4 pack of bulbs for about $1 even 100W bulbs were that cheap and I took all the incans out of everything in the house except for one outdoor light that I rarely use for more than 5 minutes at a time and a CFL in cold weather wouldn't work well in that situation. When I move out of this rental the incan bulbs will go back into all the sockets and my CFLs will come with me to the next place most likely.
One thing I have been looking at is LED tubes to replace 4 foot shop lights that I have as the garage isn't heated in the winter the tubes don't warm up well for about half an hour. The thing that is stopping me is about $10 a tube I figure I will just wait till I run out of fluorescent tubes for the light fixture I picked up 4 used ones at a Habitat for Humanity for $1 each about 10 years ago as they were about $6 or so in the stores at the time.

 

[5S8Zh5]

All good info to me, thanks everyone. So A19 is the bulb size. I'm buying for the kitchen overhead lights and a lamp, that takes E26. Got a 16 pack of GE 10W 2700K, and a 6 pack of 4W E26 3000K for a reading lamp.

 

[kaichu dento]

I say that for a quick one time thing the sensor idea is appealing but when you have to replace the bulb a few times buying a stand alone sensor adapter (if it fits) is probably cheaper in the long run and doesn't limit you to one brand/size bulb.

Naw, the only reason to use them is like I said above; only if installing a photosensor is problematic. They're normally far too easy to install to not go that route.

 

[Lynx_Arc]

Naw, the only reason to use them is like I said above; only if installing a photosensor is problematic. They're normally far too easy to install to not go that route.

Yeah having the sensor built in does allow for use in a space that barely fits the bulb as the screw in sensors usually add a few inches to the height. I've installed those sensors outside of a neighbors house that had a business and some supplies kept outside. The sad thing is the CFLs don't like a lot of sensors as they don't have a threshold to turn them on off they dim them on and off. I think LED bulbs don't work right with the old incan light sensors either that are dimming.

 

[hugodrax]

Now you can get 9000 lumen Ceramic on chip high CRI A21 bulbs that consume 60w. Amazing how fast things are moving.
Installed one on a floor lamp and it lit the whole room like a football stadium lol