Use an flasher that supports LED light. I am strongly against load resistors as they defeat the energy savings, can be a potential fire hazard and cost more than a LED flasher.
The flasher looks exactly like any car relay.
'03 TJ Sport
/ D30/Ford9 / 35x12.5x15 KM2 / D window black steel 15x8 wheels / 3" custom long arm lift / SYE & 1350 DS / JKS BL / 1" MML / Smittybilt's front bumper, Tube fenders, Rocker guards, and rear bumper / High Rock Tire Carrier