I have pontificated that idea myself.
I don't know why I didn't stock up myself.
I like the incandescent color of the Cree LED bulb from Home Depot
2700K. The downside, if you want to equal a 100 watt incandescent, is it's only 800 lumens. For some fixtures it would be nice to have an adapter to hold two bulbs, to have nearly equal lumens. I still hate 6000K bulbs in the morning at first rising, after light adjustment there good. Mikek