Pull out the bulb....look at the base....try to get a replacement in LED.
Try superbrightled....if they don't have it, you most likely can't get it.
I replaced the incandescent bulbs in the fridge with LED....a bit brighter at the fraction of the heat....I didn't do it for the power...it did it for the heat....if you left the door open, you basically had 80w of heat melting the butter or cheese.
One other advantage of LED.....they tend to be directional....hence, ideal for your application.