A little update, I went with Diode Dynamics 720 lumen LED backup lights.
Backup LEDs for 2001-2021 Toyota 4Runner (pair)
Works good for closing farm gates as long as you have a passenger. I don't trust parking / emergency brakes enough to leave the vehicle in reverse and hop out.
They are crazy bright. Negative is they put a lot of glare into the back up camera.
Note: you need to straighten and then bend the prongs on each LED bulb into a "U" shape to get them to stick in the sockets on the 4Runner. If you don't do that, they will fall out of the socket into the housing.
Forcing you to to remove the housing and fish the bulb out with a long set of tweezers...
Fortunately the tail light housing comes off pretty easily.
Tail Light Replacement Guide 5th Gen 4Runner, Tail Light Housing Install
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2019 OR - LT285/70R17 Yokohama Geolandar MT, SPC UCA's, BMC, Eibach Pro Truck Lift, Warn VR10 Winch, Warn 100022 Winch Bumper, TRD Skid Plate, Cali Raised Light Bar, Shrockworks Sliders and Skids, LFD Ruggadized Cross Bars, Sprint Booster.