TP-Link Kasa Smart WiFi Light Bulb Review (Model KL125)

The most affordable color smart bulb in TP-Link’s Kasa Smart lineup, the TP Link Kasa Model KL125 Smart WiFi Light Bulb has some nifty tricks up its sleeve and deep programming functionality, even if other aspects of the bulb are rough around the edges.

Compatible with Alexa and Google Assistant, the Wi-Fi enabled Kasa Smart KL125 comes with an attractive (albeit sometimes complicated) mobile app, handy one-touch shortcuts for color temperature presets, an impressive number of programming options, and an “Auto-White Mode” that simulates sunlight.

But like many inexpensive color smart bulbs, the Kasa Smart KL125 has its downsides, including a lengthy Wi-Fi setup process and the inability to schedule lighting scenes (for now, anyway), while advertised Samsung SmartThings functionality did not work. during my test.

This review is part of TechHive’s coverage of the best smart bulbs, where you will find reviews of competing products, as well as a buyer’s guide on the features to consider when purchasing this type of product.


With an MSRP of $ 14.99 each (2-pack is $ 24.99, 4-pack is $ 39.99), the 800-lumen KL125 is the most affordable of the multi-color bulbs. style A19 by Kasa Smart. The brand also offers the Kasa Smart KL130 ($ 21.99 listing), which offers a slimmer housing, a flatter but curved bulb shape, and a wider range of color temperatures (from a warm 2,500 Kelvin to a cool 9,000K, vs. 2,500K at 6,500K daylight for the KL125), while the brightest, 1000 lumens Kasa Smart KL135 ($ 22.99 each) adds a more energy efficient design and easier Wi-Fi setup via Amazon’s “frustration-free setup” feature. Kasa also makes tunable and / or dimmable white bulbs, as well as a couple of filament bulbs (warm amber and soft white).

In contrast to the sleeker-looking KL135 and KL130, the KL125 we’re reviewing here has a traditional spherical A19 bulb shape and a smooth conical housing, and is equipped with an E26 base that screws into standard plugs. As I mentioned earlier, the bulb supports white color temperatures from a warm 2,500 Kelvin to 6,500 K, which is roughly the color of daylight on a hazy day, as well as up to 16 million colors. TP-Link rates the KL125 at 800 typical lumens, which I found more than adequate for lighting a room or workspace.

kasa smart bulb wi fi multicolor k125 green Ben Patterson / IDG

The TP-Link Kasa Smart Wi-Fi KL125 bulb glows in up to 16 million colors, and is adjustable from a warm 2,500 Kelvin to a daylight equivalent of 6,500K.

As with the other smart bulbs from the brand, the Kasa Smart KL125 connects directly to Wi-Fi networks and therefore does not require a (potentially expensive) smart home hub.

Installation and configuration

I didn’t have much trouble connecting the Kasa KL125 smart light bulb to my Wi-Fi networks, but it does involve jumping a few hurdles. You will first need to install the Kasa Smart mobile app and then (if you haven’t already) create a Kasa Smart account, which involves submitting an email address, creating a password (there is no option to log in with Google, Apple, or Facebook) and accepting the terms of use and privacy policies of Kasa.

After allowing (or not) allowing the app to use your location, tap the “+” icon in the upper corner of the Devices screen, then go through a bunch of menus until you finally get to the “correct KL100 Series”. ”Of light bulbs (I would have preferred to simply scan the QR code on the box). Then you screw the bulb into a socket, turn it on, wait for it to blink three times, and then connect to the bulb’s local Wi-Fi network. Once connected, the app asks you to enter your Wi-Fi password, and if all goes well (and after you’ve named the bulb), you’re done.

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