AOD for devices that do not require burn in protection

I am working on a few watch faces and started integrating Always On Display mode. For devices that require burn in protection I'm using a checkerboard pattern that shifts by a pixel every minute. This also darkens the screen quite a bit which is intended. I'm aware that this approach is a bit more memory intensive and will not work for all devices. My question pertains to watches that do not require burn in protection. Do I need to darken the screen in low power mode or only target the ones that require burn in protection? Do these watches (fenix, forerunner, epix, etc...) do that automatically to save battery life?

Thanks!