H4 Resistor Modules (pair). After fitting Ultima L.E.D Performance Globes, some users may discover a globe warning light appears on their dash due to the different current draws when using L.E.D globes in place of halogen. Narva's new load resistors are a plug and play solution that fit easily between the L.E.D performance globes and the vehicles wiring harness plug, and should resolve the issue of a warning light appearing.