SwitchBot Color Bulb Review: A Bayonet Color Bulb That Works With Every Major Platform Except Matter
RGB plus 2700K to 6500K white, Wi-Fi and Bluetooth on board, and a B22 fitting for bayonet sockets.
The SwitchBot Color Bulb is a 10 W B22 bayonet bulb that covers both RGB color and the full 2700K to 6500K white range, and connects over Wi-Fi with Bluetooth as well, so no hub is required. Its strongest card is compatibility: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant and IFTTT are all supported, which is a longer list than most bulbs manage and unusual for a bayonet fitting. Matter is the one gap. If your sockets are B22 and you want colored light that works with whatever platform you use, this is a straightforward buy.
- Homes with B22 bayonet sockets
- Apple HomeKit users
- Color and mood lighting
- Multi-platform smart homes
Pros
- Works with Google Home, Alexa, Apple HomeKit, SmartThings, Home Assistant and IFTTT
- RGB color plus the full 2700K to 6500K white range
- B22 bayonet fitting, which few smart bulbs offer
- Wi-Fi and Bluetooth on board, so no hub is required
- Adjustable brightness with automation support
- Low price
Cons
- No Matter support
- B22 bayonet only, so it will not fit E26 or E27 sockets
- Maximum brightness, voltage, power-off memory and dynamic scenes are not documented
- Wi-Fi based, so each bulb occupies a slot on your network
- One year warranty
Who is the SwitchBot Color Bulb for?
Bayonet fittings are standard in the UK and several other markets, and smart bulbs for them are far less common than E26 and E27 screw versions, so the B22 base is itself a reason to choose this one. Beyond the fitting, the appeal is that it does not tie you to an ecosystem: it works with Apple HomeKit and with Google Home and Alexa, plus SmartThings, Home Assistant and IFTTT, so it survives a change of platform. Wi-Fi and Bluetooth are both on board, which means it pairs and runs without a hub.
What it offers
Color coverage spans RGB for scenes and moods plus the full 2700K to 6500K white range, so it can be a warm living room light in the evening and a cool daylight lamp for working. Brightness is adjustable, and automations are supported for schedules and triggers. Having both Wi-Fi and Bluetooth on the same bulb is genuinely useful: Bluetooth handles local control at close range while Wi-Fi carries remote commands and voice assistant integration.
What to know before you buy
Check the fitting first: this is B22 bayonet, so it will not screw into E26 or E27 sockets without an adapter. Matter is not supported, so it will not join a Matter-first setup natively. A few specs are undocumented for this model, including maximum brightness in lumens, operating voltage, power-off memory behaviour and whether dynamic scenes are available, so treat those as unknowns rather than assuming. It draws 10 W, and there is no Zigbee router role, since it is a Wi-Fi and Bluetooth device, meaning each bulb takes a slot on your Wi-Fi network. Warranty is one year.
Is the SwitchBot Color Bulb worth it?
It is priced in the budget bracket while offering color, tunable white and the broadest platform support in that bracket, and for a bayonet socket the alternatives are thin on the ground. The reasons to look elsewhere are specific: you need Matter, or you are lighting a whole house and would be better served by a Zigbee system that keeps dozens of bulbs off your Wi-Fi.
Frequently asked questions
What fitting does the SwitchBot Color Bulb use?
B22 bayonet, the push-and-twist fitting common in the UK and some other markets. It does not fit E26 or E27 screw sockets without an adapter.
Does it need a hub?
No. It has both Wi-Fi and Bluetooth built in, so it connects directly.
Does it work with Apple HomeKit?
Yes. Apple HomeKit, Google Home, Alexa, Samsung SmartThings, Home Assistant and IFTTT are all supported. Matter is not.
Can it produce warm and cool white as well as color?
Yes. It covers RGB color and the full tunable white range from 2700K to 6500K, with adjustable brightness.
How much power does it draw?
10 W. The equivalent lumen output is not documented for this model.


