Do I need to upgrade my alternator with these fans?

Nice! I was starting to look into the headlight relays a few weeks ago, but got distracted when some other parts arrived and I was too excited to put them in. Do you have a good write up for the headlight relays? And also sorry for my ignorance with electricity, but what exactly is an amp spike and why would there be one at startup? The fans won't even be on!

Spike meaning when the fans start up, not the motor.:D
Most electric powered devices like electric fans have a much higher load when they first start turning, then as their motor gets up to speed the load lessens.

I do have the info on the relays, but our member @crackedback sells kits just for that and I don't want to step on his toes.:D