elect problem

Hi All,
I have just fitted DC electronic ignition with wassel and battery. When I start the engine turn on the lights and rev the engine all is ok, side lights work as they should, but when I disconnect the battery turn on the side lights all ok, but when i rev it up the side lights go dull. This is only happens with the side lights. All is ok with both side lights and head lights on, just the side lights that go dull when the battery is disconnected and revving the engine . Any idea what going on.
Cheers
Stag

I have just fitted DC electronic ignition with wassel and battery. When I start the engine turn on the lights and rev the engine all is ok, side lights work as they should, but when I disconnect the battery turn on the side lights all ok, but when i rev it up the side lights go dull. This is only happens with the side lights. All is ok with both side lights and head lights on, just the side lights that go dull when the battery is disconnected and revving the engine . Any idea what going on.
Cheers
Stag
