Curious as to if anyone has done this, I did this myself on my 3IS, it wasn't too bad just have to be careful when disassembling the mirror. What bulb would we use to replace, the same as a regular GS350 I'm assuming.

Side note...not sure why lexus couldn't install led puddle lamps from the factory. Such a simple thing to overlook when the rest of the car has LED's

 

That is on my list for Things To Do....
I'm glad you mentioned that.......
I want to swap ALL bulbs to LED....

 

If I'm not mistaken, all the bulbs in the GS-F are LED except the puddle lights, vanity lights and trunk light. Unless i missed a few