Buying replacement light bulbs for your outdoor patio string lights is easy once you know which type to order. The most common patio string light bulb is an S14 bulb with medium E26 base type. The second most common is the Edison style A15 shape light bulb. Both are excellent options to replace your patio string lights.
We manufacture both the S14 and the A15 in LED filament. The A15 is a smaller version of the standard Edison shape lightbulb you're used to seeing everywhere. The S14 is even smaller than the A15 and is only seen for sign lighting when not for patio string lights.