Something that alot of people have done and I can now I've joined the ranks of those who have upgraded. The difference is (pardon the pun) like night and day. The LED's have a much brighter and whiter light. I did not put a multimeter to actually measure the difference but I'm sure it's substantial. Of course another benefit is that they don't put out the heat of incandescent bulbs.
No, they weren't cheap, but I'm not one that boondocks, I am staying in mine for work and the savings will be appreciated when it comes time to pay the electric.
Pic is of the LED's in front and the incandescent bulbs to show the difference.