Can the lights that are in the door handles be changed???

 

I have a 2017 RX350 and I want to switch my factory interior lights to LED's . Can the under the dash light be changed and also the door handle lights???

 

I'm trying to find out what that light that comes on when you walk near your car is called. I thought it was the puddle light but i can't find any information about it. I want to try to change whatever bulb or led it is because at night in the rain you can barely see anything. Anyone have link or any info about this light?