Lights, Elec. Guros question

[BigM]

Wired 2- 54 watt led bar type lights to frt. of bike. Used a relay fused from battery. Not through ignition, lights, or etc. When i turn the lights on my f.m. radio reception weakens. Turn them off and the station strength increases. from what I can tell these pull around 5 amps ea. I figured that wouldn't be enough to affect anything. Also will this affect my alternator/ Here is the link for the lights. Any ideas?  Thanks
 http://www.ebay.com/itm/112030606660?_trksid=p2060353.m2763.l2649&ssPageName=STRK%3AMEBIDX%3AIT

[Blackduck]

The current draw is basically nothing to these, I run twin 100 watt driving lights.
What did you do for the ground on the lights? I run all accessory grounds back to the battery.
Cheers Steve

[Itinifni]

Also make sure your light wiring, particularly the power supply is not routed close and parallel to your antenna feeder cable.