led bulbs question

ive seen seen topics about this but i just want to be sure. can i add led bulbs without swapping fuses and if i do, what is the best fuse to use without it blowing. like the bulbs here in this ad.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2417923578&category=35598

Member since 8/30/02. Forget what the post count says!