[Masteryota]

It has the same effect as running more accessories on your car. The more you run off the crank, the more power it takes to drive them, and less being put out to the trans and so on. The same effect when you turn the a/c on, on smaller cars, you will feel the difference in power.

I stand by my original comment, LED lights draw much less, and while they can be expensive, they are worth it to not invest in the engine and lose driving power.