My personal opinion is that trying to wire your home refrigerator for LEDs is false economy. As others have said, energy savings are greatest for those lights that you have on for extended periods of time. Your refrigerator really shouldn't be opened for more than 30 seconds or so at a time. (Unless you have a teenaged boy :) ) Even with incandescent bulbs, they aren't going to throw off that much heat in such a short period.
You'll save far more money by ensuring that you don't put any warm leftovers in the fridge - let them cool to room temp. first. And keep your freezer relatively full. Be sure your door gaskets are tight (use the dollar bill trick). Vacuum the coils frequently. And I'm sure you could step down the wattage of an incandescent bulb 10 watts or so and still be able to see the food in your freezer and fridge. But I'd only do that if or when your current incandescent fails. Of course I don't see why you couldn't just also use a standard base LED once your incandescent fails.
Link to LED appliance bulbs
