A smart plug turns a dumb lamp into a smart lamp, cheaply. A smart bulb adds color, dimming, and scenes, at a higher cost per fixture. The trap is that a smart bulb only behaves if you leave the physical wall switch on, because flipping that switch cuts power to the bulb. A plug never has that problem.
Smart plug
An outlet adapter you plug into the wall. Any lamp or appliance plugged into it can then be switched on or off by voice or app.
Smart bulb
An LED bulb with a built in wireless radio. The bulb itself is the smart device, dimmable and often color adjustable from an app.
The real tradeoffs
| Dimension | Smart plug | Smart bulb |
|---|---|---|
| Cost per fixture | One plug works for a whole lamp forever. | One smart bulb per socket, every time. |
| Color and dimming | Only what the lamp already supports. | Full color, full dimming, scenes. |
| Wall switch behavior | Works no matter what the wall switch does. | Fails if anyone flips the wall switch off. |
| Setup | Plug in and pair once. | Screw in, pair, configure scenes. |
| Energy monitoring | Many plugs report energy use. | Some bulbs do, most do not. |
| Price range | Entry level. | Entry level to mid tier per bulb. |
So which one should you buy
Pick Smart plug
Pick smart plugs for lamps, heaters, and fans. Cheap, flexible, and they work with whatever is already plugged in.
Pick Smart bulb
Pick smart bulbs for fixtures where color, scenes, or per bulb dimming really matter, and teach everyone in the house to leave the wall switch on.
See our picks in this category
Once you've decided which concept fits your life, our hand tested roundups cover the specific products we recommend:
Frequently asked
Frequently Asked Questions
Can I use both?
Yes. Smart plugs for lamps and appliances, smart bulbs for accent lights and bedrooms. It is the most flexible setup.
Does a smart plug work with any lamp?
If the lamp has a standard plug and a simple on off switch set to on, yes. It cannot control a touch lamp or a three way switch.
Do smart bulbs keep their settings after a power cut?
Most remember the last color and dim level. A few reset to full white on power up, which is annoying for bedrooms.
Which is easier for beginners?
Smart plugs. The mental model is simple, the install is ten seconds, and any lamp in the house becomes a smart lamp.
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