I built a truck for a friend, with a lot of led lights because she likes them.
With multiple lights kits I was thinking of running both into the receiver using a splitter, but want to make sure I do this right and dont fry stuff. So if I need to get a bec or separate battery for the lights I can do that.

It has a roof light bar with a receiver plug and a control box plug.
Billet Machined Type III Alloy Roof Top Spot White LED (5) Light Set for R/C or RC - Team Integy

And it has a 4 strip kit on the inside of the body with a receiver plug
https://www.ebay.com/itm/G-T-POWER-C...72.m2749.l2649

Truck runs off 2s, with a stock tamiya esc.

I'd expect those LED kits to use sub-100mA current levels. They shouldn't tax a half-decent BEC.

Agreed, your not pulling hardly any power. Any bec could easly power that. You don't really need to worry until you start measuring those strip lights in feet.

Thanks guys.