Two rigid ignites flash when truck is off

I installed two flush mounted rigid ignites last night in my bumper. I wired them up in series with teh switch pro. When the truck is running, they work great.

But when the truck is off, and I turn them on, after about 10 seconds, they start flashing. I pulled them off the switch pro and hardwired to the battery... same flashing after 10 seconds or so. So it's not the switchpro doing something weird.

Any suggestions about what's going on? I guess I could try wiring them in parallel.

I did make a quick video, and it sort of seems like they are quickly dimming before they turn off for the flash. I didn't notice this last night, and its possible that its a function of recording.



I also used 18 gauge wire, because I thought that was what was on teh ignites... but the wire I used to run it to the switch pro did seem a little thicker than what was attached to the ignites.

 

They should be in parallel back to a power source. 18 gauge seems a little small too, but not sure what their amp draw is.

 

Thanks. That's what I figured. Stupid me.

The amp draw spec is 0.85 amps. the wires off the lights seemed thinner than the 18 gauge wire I bought to wire them in, but that should be enough I would think (note: I'm the one who wired it wrong too).