Could you pull a bulb? Most have a number.
Good LED bulbs are expensive, have you considered replacing the whole fixture. This can be especially nice if yours are yellowed from age or heat.
2017 SLX 195RB
2021 Jeep Grand Cherokee Summit L 5.7L V8
Andersen WDH hitch, Renogy 100 AH Lithium &
200 Watts solar panels from Renogy
Prev. '14 Jeep Grand Cherokee Overland, gas 3.6 V6