"Best" LED conversion for 2D cheepo flashlight?

Not sure if this is correct forum. Please make recommendations for “best” drop-in LED conversion for 2D cheepo incandescent flashlight.

Until others start posting the actual best, here is one that I have bought several times.

It gets a little cheaper than this sometimes. Amazon.com

Here is another source that might help you. https://www.superbrightleds.com/cat/universal-led-bulb-finder/

I’m curious about run time, if someone wants guess how long that Dorcy bulb might run on 2 Tenergy D 8,000mAh LSD batteries, or on Alkaline Ds.