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What's That Bulb

Find your lightbulb

Brighten your life

Looking for a light bulb?

Choose the right bulb in a flash with our light bulb bot.

If you don't know what kind of light bulb you have, it can be hard to figure out what kind of shape or size you need to replace it. Especially older bulbs with dated styles, it can be hard to figure out what the size, shape, style, brand, base and technology of your bulb is without a label or an easy reference. Worse, so many bulbs just have cryptic codes on the base, where googling won't return results.


Give us a picture of your light bulb, and our neural network will try to identify it for you.

You can upload a picture of your light bulb using the form below. The picture must be a valid image file. It should just show the light bulb on a plain background.

Click to select an image, or drag and drop a picture below.

How it works

We use image recognition to identify the shape, size, and technology of your light bulb, making it easier than ever to replace your old bulbs.

Whatsthatbulb is powered by a convolutional neural network trained on over thirty different categories of light bulbs. This is a new kind of machine learning called "deep learning" which is starting to approach human performance in image recognition problems.