I'm not sure but I assume LED lights draw very little power
They draw less current than incandescent lighting per lumen output yes, but as EOD Guy has rightly pointed out, standby mode draws additional current of its own when a circuit is/remains active.
We have a fleet of Ford Explorer hybrids at work, and if you do not set the electronic parking brake the vehicle remains in standby mode, so even with all lights turned off there is a very high chance of a dead 12V starting battery if it sits that way overnight. Those batteries are set into the firewall with terminals accessible through a plastic access plate. Regular jumper cables don't reach the terminals very well. Brilliant design on multiple counts- thanks Ford








