Smart Home · Head-to-head
Lutron Caséta Diva Smart Dimmer Switch vs Kasa Smart Wi-Fi Light Switch, Dimmer (KS225)
Which should you buy? Our verdict on both, pulled from our full Which Smart Light Switch Actually Fits Your Wiring? comparison.
The Diva installs in boxes without a neutral, which is the single biggest reason smart switches get returned, and it keeps working on its own radio network when Wi-Fi drops. The KS225 is the cheaper, hub-free route for newer homes that do have a neutral.
Lutron Caséta Diva Smart Dimmer Switch
Buy itA paddle-style smart dimmer that needs no neutral wire and talks to its own hub instead of your Wi-Fi.
- Lutron states no neutral wire is required, so it suits older switch boxes where neutral-dependent switches cannot go.
- It dims up to 150 W of dimmable LEDs or 600 W of incandescent or halogen bulbs, with a soft-glow light bar for finding it in the dark.
- Lutron lists multi-location control with an existing wired toggle switch, a wired Claro accessory switch or a wireless Pico remote.
- App control, voice control and schedules need the Caséta Smart Hub, which plugs into your router and adds to the cost.
- It is a dimmer for dimmable bulbs only; on/off loads such as fans need Lutron's separate Claro smart switch.
- The product page we loaded does not name a safety listing, and Lutron's spec sheet links did not load for us.
Kasa Smart Wi-Fi Light Switch, Dimmer (KS225)
Buy itA low-cost Wi-Fi dimmer with Matter certification and no hub, for boxes that have a neutral wire.
- It connects straight to 2.4GHz Wi-Fi, so there is no hub to buy, and it is Matter-certified for Apple Home, Alexa, Google Home and other Matter platforms.
- TP-Link says connected devices stay controllable over your local network through the Kasa app or a Matter controller when the internet goes down.
- The spec sheet lists UL among its certifications and includes a wall plate, wire nuts and wire labels in the box.
- TP-Link states a neutral wire is required, and its wiring guide says a ground wire is recommended and may be required in some regions.
- Its incandescent rating is 300 W, half that of the Lutron, Inovelli and Eve dimmers.
- The product page does not say whether it works in a 3-way circuit, and it uses leading-edge dimming only.
Side by side
The 8 criteria below are the ones our full comparison judged every product on, narrowed to these two.
| Lutron Caséta Diva Smart Dimmer Switch Our pick | Kasa Smart Wi-Fi Light Switch, Dimmer (KS225) | |
|---|---|---|
| Our verdict | Buy | Buy |
| Best for | Owners of older homes, or anyone without a neutral in the box, who want the most reliable wall dimmer and do not mind adding a hub. | Homes built with neutrals in the switch boxes where the buyer wants Matter dimming without a hub. |
| Price tier | $$ · mid-range | $ · budget |
| Neutral wire | Not required | Required |
| Connection | Lutron Clear Connect via Smart Hub | 2.4GHz Wi-Fi |
| Hub needed | Caséta Smart Hub for app, voice, schedules | No |
| Max LED load | 150 W | 150 W |
| Max incandescent load | 600 W | 300 W |
| Multi-location | Wired toggle, Claro accessory or Pico remote | Not stated on product page |
| Matter | Not stated on product page | Matter-certified |
| Certification named by maker | Not stated on product page | UL, FCC, IC |
Which one is right for you?
Pick the Lutron Caséta Diva Smart Dimmer Switch if
owners of older homes, or anyone without a neutral in the box, who want the most reliable wall dimmer and do not mind adding a hub.
Know before buying: app control, voice control and schedules need the Caséta Smart Hub, which plugs into your router and adds to the cost.
Pick the Kasa Smart Wi-Fi Light Switch, Dimmer (KS225) if
homes built with neutrals in the switch boxes where the buyer wants Matter dimming without a hub.
Know before buying: tP-Link states a neutral wire is required, and its wiring guide says a ground wire is recommended and may be required in some regions.
The bottom line
Our overall pick is the Lutron Caséta Diva Smart Dimmer Switch - A paddle-style smart dimmer that needs no neutral wire and talks to its own hub instead of your Wi-Fi. Choose the Kasa Smart Wi-Fi Light Switch, Dimmer (KS225) instead if homes built with neutrals in the switch boxes where the buyer wants Matter dimming without a hub.
Want the full picture, including the other options we compared and the popular one we'd skip? Read the complete Which Smart Light Switch Actually Fits Your Wiring?.