LED-kit1 LED Up Grade for 4.25 Monarch, and the 4.25 Red Lens. This kit comes with all you need to upgrade your Airstream Tail lights to LED. The LED pads can be taped on the back (tape included on back) of the light housing or glued to the light lens itself. This glue dries clear. The advantage to this light is it is much brighter than the regular incandescent bulbs plus it has 42 LEDs over one filament. If one filament goes bad you have no light, and 4 or 5 LEDs could go out you will have a bunch of light. See pictures below.