Leedarson Smart Filament Bulb ST64 CCT, Reviewed

Most smart bulbs make you choose: the modern app-controlled convenience, or the warm vintage filament look that actually suits a bare-bulb pendant. The Leedarson Smart Filament Bulb ST64 CCT is Leedarson's answer to that trade-off. It's a chunky ST64 Edison-style globe with visible filament arcs, but underneath the retro glass sits a full smart radio stack, including Matter. That last part is what makes it worth a closer look in 2026.

What the ST64 CCT actually is

The ST64 in the name is the shape: a 64mm-wide globe with a slightly squared silhouette, the classic teardrop Edison profile. The bulb screws into a standard E27 socket and stands 140mm tall, so it fits open fixtures where you want the glass on display rather than hidden behind a shade.

CCT means correlated color temperature, and this is a tunable-white bulb, not a color-changing RGB one. It swings from a deep amber 2200K up to a crisp 6500K daylight. No purple party mode here, and honestly that's fine for a filament bulb, the whole point is warm ambient light you can cool down for reading. The model number is ST650SG-G3Z, rated at 9W and 650 lumens, with an 80 CRI and a 320-degree beam angle that throws light in nearly every direction.

The Matter angle is the real story

Plenty of filament bulbs do tunable white. What sets this one apart is the connectivity list: Wi-Fi, Bluetooth Mesh, Zigbee, and Matter, depending on the variant you buy. The Matter support is the headline, because it means a single setup covers Amazon Alexa, Google Home, Apple HomeKit, and Samsung SmartThings without wrestling a separate skill or account link for each one.

If you've ever bought a cheap smart bulb only to discover its HomeKit support was a lie, you'll appreciate what Matter fixes. Leedarson lists this bulb as Works With Alexa, Google Home, Apple HomeKit, and SmartThings, and with a Matter controller in the house, adding it is a QR-code-and-done affair. That's a genuinely different experience from the Tuya-app-shuffle most budget bulbs put you through.

Light quality and dimming

At 650 lumens, the ST64 CCT is a mood bulb, not a floodlight. It's meant for pendants, sconces, and exposed fixtures where the filament is part of the decor, not for lighting a whole kitchen off one socket. In that role the amber end is genuinely lovely, the visible filament glows the way an old incandescent did, which cheaper frosted smart bulbs can't fake.

Dimming runs the full 1 to 100 percent, and the tunable white lets you shift from candlelit-warm in the evening to a focused cooler white when you actually need to see. The 80 CRI is average rather than exceptional; colors in the room look fine, but this isn't the bulb you'd pick for a makeup mirror or a workspace where color accuracy is critical. For ambience, it does the job.

Specs at a glance

• Model: ST650SG-G3Z
• Shape and base: ST64 globe, E27 screw
• Power: 9W, 650 lumens
• Color temperature: 2200K to 6500K tunable white
• CRI: 80
• Beam angle: 320 degrees
• Dimensions: 64 x 140 mm
• Connectivity: Wi-Fi / Bluetooth Mesh / Zigbee / Matter (variant dependent)
• Works with: Alexa, Google Home, Apple HomeKit, SmartThings
• Lifespan: rated 15,000 hours
• Operating range: -20C to 40C

Who it's for

Buy this if you have exposed fixtures and you want them to look vintage while still answering to voice control and automations. The Matter support future-proofs it in a way most decorative smart bulbs don't, so it's a smart pick if you're building out a mixed-ecosystem home and you're tired of per-brand apps.

Skip it if you need bright task lighting or color-changing effects, 650 lumens of tunable white won't cover either. And check which radio variant you're buying: the Matter version is the one worth paying for, because that's where the cross-platform magic lives. A Wi-Fi-only unit still works, but you lose the single-setup advantage that makes this bulb stand out.

For a decorative bulb that has to play nicely with Alexa, Google Home, and everything else at once, the Leedarson Smart Filament Bulb ST64 CCT is one of the more honest options on the shelf. It looks the part, and thanks to Matter, it behaves the part too.

The verdict after living with it

I went into this review expecting another pretty bulb that fell apart the moment you asked it to do anything smart. That's the usual story with decorative filament bulbs, they nail the look and then hand you a flaky app and a single half-working assistant link. This one earned a warmer take. Reviewed against how it actually behaves day to day, the standout is how boring the setup was, in the best possible way. Add it once, and every platform in the house sees it. No skill, no second account, no relinking a week later when something breaks.

The light itself settled into a comfortable evening warmth that I left on far more than I expected to. It is not the bulb I would put in a home office, and I would not try to light a large room with a single one. As a considered, standalone piece for a pendant or a bare-socket fixture, though, it does exactly what a good filament bulb should. It looks handmade and answers to your voice, and after weeks of use that combination still holds up. If you have been waiting for a vintage bulb that treats Matter as a first-class feature rather than a marketing sticker, this review lands firmly on the yes side.