How many amps?

[dragoneggs]

I'm assuming the bar is crazy bright?

I'll have to look into some 8g wire.

Knock yourself out. 8g is rated for 40amps. Twice what you need. 10g is rated for 30amps. Do the math. VA=W.

 

[4570Man]

15 amp draw unless I'm missing something. 12 gauge would be adequate and 14 gauge would probably work.

 

[Fallon]

I went way overkill on power distribution & light bar install on my L4060. http://www.tractorbynet.com/forums/customization/376458-let-there-light-l4060-light.html

The cheap ($50-70) LED light bars both pulled around half the advertised wattage. 42-50" bars if I remember suppose to pull 250 & 300 watts, but tested at half that in the automotive voltage ranges. Both hella bright though. I might replace one because it is noisy on the RF spectrum & kills the radio reception.

 

[cold1313]

I went way overkill on power distribution & light bar install on my L4060. http://www.tractorbynet.com/forums/customization/376458-let-there-light-l4060-light.html

The cheap ($50-70) LED light bars both pulled around half the advertised wattage. 42-50" bars if I remember suppose to pull 250 & 300 watts, but tested at half that in the automotive voltage ranges. Both hella bright though. I might replace one because it is noisy on the RF spectrum & kills the radio reception.

That's a really nice setup. Something like that is my goal. With the colder weather here, it might have to wait until Spring. My biggest issue at the moment is how to mount the lights (No cab for me) so that when I'm mowing and the tree branches smack the ROPS, my lights don't move / get damaged. On my last tractor, I had fabricated brackets to protect the lights, but then branches would get hung up on it, because it stuck out past the ROPS - not allowing branches to ride up the ROPS and fall off. More thinking I guess.

 

[Gary Fowler]

Well if you scroll around on that website and find the wiring harness for those lights, you find that they are using 16 gauge wire so the amps cant be that much. I would say less than 5 amps for that bar if comparable to other light bars of that size.
I also find that the specs for that light bar are pretty ambiguous, i.e. "high quality LEDs". What exactly is high quality, probably not Cree or they would have said so. Most likely Chinese made. That doesn't specifically mean that they wont light up the world around your tractor though.

 

[marchanna]

The limitation is usually not the LEDs themselves, it's the circuit boards and heat dispersion. Without proper heat dispersion, the LEDs will fail prematurely, so the circuitry is usually configured so that they operate at a wattage that gets them past the warranty period. The lights are usually marketed based on the sum of the maximum wattage of the LED's, not on actually power consumption. Most LED are either SMD or Cree, one is not necessarily better than the other, so the statement about them being high quality LEDs is usually true, it's the rest of the light fixture assembly that is probably crap.