I haven't seen anything about them staying on with a dim glow, mine would flicker for about 30 seconds after turning the jeep off. Found out this was due to the CANBUS sending out test signal to the lights looking for blown bulbs, apparently it is just a small spike that has just enough power to fire an LED but not a filament bulb. The cure for my flicker was to wire a relay directly in-line with the lights. Power to the lights thru the relay and still use the factory circuitry to trigger the relay.
1998 Sahara----Traded for JKUSp
2012 JKUSp Bright White, Black Freedom Top
Work in Progress