Questions regarding fitting couple of LED lights on old Ford3910H tractor

[Pilatus]

The power consumption of two LED lights I am considering fitting to the tractor is 81W, it says in the operators book tractor specs that the tractor is fitted with a 12v 46amp alternator,will that provide enough power for the lights without overloading it.?
I dont know a thing about electrics so no apologies for asking the question.

 

[Sharpy]

It will be fine, two headlights total draw 110 watt, standard worklights draw 55 Watts.

 

[Kevm]

Search for "ohms law calculator" and put in what you know and it will tell you the amps.
Once you get above about 15amps you should have some decent thick wire.
Alternator should cope so long as it is in goodish nick.

 

[Netherfield]

81w is just under 7 amp, alternator should have no problem.