Ensure adequate power
Just had a call from a long time client who installed two new 80 watt flood lights on the back of his air-cart to illuminate his tow behind air-seeder bar. They are the ledlb8x102rowflood, plenty bright enough, except one light was flashing from side to side and the first light to receive the power was working just fine.
The cause was lack of power. If it had been left to run, the lightbar would have burnt out.
If when installing additional lighting and things don’t feel right, check the amount of power they are receiving.