Get an adapter for e11 to e26 and install with a par 38 flood light LED equivalent to 250 watt light bulb. In my case it needs to be dimmable.
@Will Wessel, What was the height of your lights that you switched with the par 38 flood light and did it improve the amount of lumens or light output in that area?
I would suggest ordering our 250W-500W E11 retrofit. It delivers 2300 or 2400 lumens depending on the color temp you choose. Even though your 250W halogens may be rated higher, a lot of those lumens are wasted and don’t hit the application area.