Hello everyone! I have to install a lot of LED Light onto my car. And I used a Relay Harness 40A connected to Battery. Do I need to use Relay Harness (30A or 40A)? Between using Relay and connecting directly to Fuse Box when the key is turned on, which one will drain the battery more. Currently I use 2x40W (Total 80W) LED bulbs in Headlights and 2x40W (Total 80W) LED bulbs in Fog Light. Are these 4 LEDs the cause of the battery draining quickly?