My instruction manual doesn't say much.
However, below is the fuse cover's chart, and a photo of the fuse box.
Which fuse is best for constant 12V power, and which type of fuse [eg Shade RR etc] is best for 12V switched power?
Also it is a Lexus IS, so does the fuse and the spare sockets look like mini-fuses, such that I can purchase a typical mini fuse piggy back or a mini fuse tap, or must we use a special fuse and fuse piggybacks/taps that only Lexus supplies?
https://drive.google.com/file/d/0B3xFS87WfHstSUdYMHI4dUNWM0k/view?usp=sharing
https://drive.google.com/file/d/0B3xFS87WfHstdVNCVjBCcHd4SlU/view?usp=sharing