Threepoint / Bumperm;
I do appreciate you guys urging me to go LED, however, this morning I purchased two GROTE #64931 Rubber Tractor & utility lamps, with its PAR 36, sealed beam incandescent bulb #4411, 35 Watt, 2,500 C.P., 12 V - 2.7 AMP., from a local shop on closeout for $9 each.
Regarding the point of possibly switching to a LED in the future, I called Grote and according to their service tech guy, there are LED replacements (#63821-5) for these lamp fixtures:
63821-5 - Trilliant® 36 LED WhiteLight? Work Light .
Now 'BoylermanCT' indicated that I would likely prefer a "warmer" 2700K LED, however, I have not been able to determine what the "Color Temperature" of the #63821 LEDs are. Then after a quick web scan, it looks like the retrofit LEDs sell for just over $100 each!

At that price, they had BETTER produce some super-duper light!
At this point, once my current incandescent sealed beams give out, I don't know if I would switch over to the LEDs or not.
I do know they would need to be less expensive than they are now.
For discussion purposes, as far as amount of light, the retrofit LEDs have 6 diodes per fixture, so the pair would provide me with 12 LED diodes producing 2200 lumens. I'm sure not as much light as your 15 diode LEDs, but I'm not in a 'light producing competition' with you..... I just want some usable light at the rear of my tractor, since I only have the glow of one red tail light there now.
Thanks, guys, for all your opinions & guidance! :drink:
BarnieTrk