Best Buys › Smart Bulbs

Smart Bulbs

The easiest way into smart lighting — and the one where the protocol you pick matters more than the brand.

Pen-and-ink drawing of filament pendant bulbs and a globe table lamp

Lighting is where almost everyone starts, because a smart bulb needs no wiring and no electrician. Screw it in, pair it, and you have dimming, colour and schedules in a room that had a single on/off switch before.

The catch is the thing nobody mentions on the box: a smart bulb needs permanent power. Flip the wall switch off and the bulb leaves the network entirely — it cannot be turned back on from an app, a schedule or an automation until someone flips the switch again. That single behaviour is the most common reason people abandon smart lighting. Either leave the switch on permanently, replace it with a smart switch or dimmer, or add a battery-powered wireless button next to it.

Which radio the bulb uses matters more than the badge. Mains-powered Zigbee and Thread bulbs act as routers — they relay traffic for other devices — so a house with a dozen of them ends up with a far more reliable mesh for its battery sensors. Wi-Fi bulbs do nothing for your mesh and add a dozen clients to your router.

What to look for

Protocol before brand

Zigbee and Thread bulbs strengthen your mesh network — the web of mains-powered devices that relay radio traffic for battery sensors. Wi-Fi bulbs do not, and each one occupies an address on your router. If you plan to build out sensors later, this is the decision that will matter in two years.

Lumens, not watts

Lumens (lm) measure actual light output; watts only measure electricity drawn. A 60 W-equivalent bulb is roughly 800 lm. Living rooms usually want 800–1100 lm per fitting, hallways are fine at 400–500, and a spot (GU10) will rarely exceed 450.

Colour quality, if you care

CRI (Colour Rendering Index) scores how truthfully a light source shows colour, out of 100. Above 90 is very good and worth paying for in kitchens and anywhere you look at food, fabric or faces. Below 80 makes skin and wood look flat.

White that changes, colour that you may not need

Tunable white (also called CCT) shifts between warm and cold white measured in Kelvin — roughly 2200 K candlelight to 6500 K daylight. Full RGB colour costs more and, in practice, most households use it in one or two rooms. Buying tunable white everywhere and colour in the living room is usually the better spend.

Behaviour after a power cut

Look for power-off memory, the setting that decides whether a bulb returns to its previous state or comes on at full brightness after the electricity is restored. Without it, a power cut at 3am turns your whole house on.

Unit price times the count

A whole house is 10 to 50 bulbs. A €5 difference per bulb is a €250 difference across a house, so the cheap-but-decent option often beats the premium one on total outcome.

The shortlist compared

BrandProtocolMesh routerHub neededNotable strengthIndicative price
IKEA (KAJPLATS)Matter over ThreadYesNoCheapest route into Matter, wide fitting range€5–13
Philips HueZigbeeYesHue BridgeBest colour accuracy and app polish€30+
Aqara (T2)Zigbee or ThreadYesNoCRI above 90, 2000–9000 K, dual protocol€20+
InnrZigbeeYesNoAccurate 1–100% dimming, 50,000-hour rating€10+
Nanoleaf (Essentials)Matter over ThreadYesNoStrong colour plus dynamic effects€20+
LIFXWi-FiNoNoHigh CRI, up to 1600 lm, infrared night-vision models€26+
WiZWi-FiNoNoLarge shape range, no bridge€11+
SengledZigbeeNoNoBuilt-in energy metering on most bulbs€15+
Shelly (Duo, Vintage)Wi-FiNoNoFilament styles with energy metering€14+
GoveeWi-FiNoNoVery vibrant colour, cheap€13+

Prices move constantly and vary by country, so we give an indicative band rather than a figure that would be stale within a month. Check the brand's own store for the current price.

The picks in detail

IKEA KAJPLATS

Matter over Thread

IKEA moved its lighting range to Matter over Thread, which quietly makes it the most interesting budget option available. Matter is the cross-vendor standard that lets a certified device pair with any compatible system without the manufacturer’s own hub; Thread is the low-power mesh radio it runs over. Together that means a KAJPLATS bulb joins a Thread-capable hub directly — no DIRIGERA gateway, no cloud account.

The range covers dimmable white, tunable white and full colour across E27, E14, GU10 and decorative filament shapes, with some E27 models reaching 1600 lm, which is genuinely bright enough for a large room. At roughly €5 for basic white and €10–13 for colour, you can light a house for the price of four Hue bulbs.

  • Cheapest Matter bulbs on the market
  • No IKEA hub required
  • E27, E14, GU10 and filament from launch
  • Acts as a Thread router
  • Colour accuracy below Hue and Aqara
  • Availability varies by store

Philips Hue White and Color Ambiance

Zigbee

Hue remains the reference point, and deservedly so — colour mixing, dimming smoothness at very low brightness, and firmware stability are all a step above the field. If you want one system that simply never misbehaves, this is it.

Two things to weigh. It is the most expensive option here by a wide margin, and control reaches other systems through the Hue Bridge rather than directly, which adds a hop and means the Bridge is a single point of failure for your lighting. In exchange you get a genuinely local, fast Zigbee network that has been refined for over a decade.

  • The colour and white reproduction benchmark
  • Enormous accessory ecosystem
  • Very stable, well-tested firmware
  • Most expensive per bulb
  • Integration runs through the Hue Bridge

Aqara LED Bulb T2

Zigbee or Matter over Thread

The T2 is the best-specified bulb here for the money. CRI above 90 means colours look truthful rather than washed out, and the 2000–9000 K range covers everything from candlelight to cold daylight. Up to 1100 lm on the E27 and 450 lm on the GU10 puts it in useful-main-light territory.

Being dual-protocol is the clever part: pair it over Zigbee if you already run a Zigbee network, or over Matter / Thread if you would rather not. Either way it acts as a router and needs no Aqara hub. The one physical caveat is length — check your fitting before ordering a shade that only just fits a standard bulb.

  • CRI above 90
  • 2000–9000 K tunable range
  • Dual protocol — Zigbee or Thread
  • Power-off memory setting
  • E27 body is oversized at 60 × 108 mm

Innr

Zigbee

Innr was founded by former Philips lighting managers, and it shows in the part that is hardest to get right: low-end dimming. Many cheap bulbs jump from off to roughly 10% with nothing usable in between; Innr genuinely dims smoothly from 1%, which matters for evening lighting and wake-up automations.

It is the sensible mid-market pick — a fraction of Hue’s price, real Zigbee routing, long rated life. The limitation is raw output, so use them in bedrooms, hallways and lamps rather than as the only light in a big open-plan space.

  • Very accurate 1–100% dimming
  • 50,000-hour rated life
  • Every bulb is a Zigbee router
  • Good value
  • Not bright enough for large rooms

Nanoleaf Essentials

Matter over Thread

Nanoleaf’s Essentials bulbs are the enthusiast’s Thread pick: very good colour, a proper Thread router, and effects like blink, strobe and flash that are genuinely useful as automation feedback rather than novelties — flashing a lamp a specific colour is a far better notification than a phone buzz nobody looks at.

The range is narrow compared with IKEA or Hue, and the initial pairing step uses Bluetooth, which is the least reliable part of the Matter experience across every brand. Once paired it is solid.

  • Excellent colour and white quality
  • Acts as a Thread router
  • Dynamic effects usable in automations
  • Small range of shapes
  • Matter onboarding over Bluetooth can be fiddly

LIFX

Wi-Fi

LIFX makes the best Wi-Fi bulbs, which is a real category even if we would usually steer you to a mesh protocol. No bridge, no gateway, high CRI, and SuperBright models that will actually light a kitchen from a single fitting.

The genuinely unusual product is the Night Vision range, which emits infrared invisible to the eye but visible to security cameras — a neat way to improve night footage without a floodlight annoying the neighbours. Worth knowing about if you are also reading our camera guide.

  • High CRI and premium build
  • SuperBright models to 1600 lm
  • Unusual infrared night-vision variants
  • Clearly the priciest Wi-Fi option
  • Does nothing for your mesh

Sengled

Zigbee

Sengled is a decent-value Zigbee range whose distinguishing feature is per-bulb energy metering, which is unusual and lets you see what your lighting actually costs. One model even integrates a PIR (passive infrared) motion detector — the sensor type that detects body heat moving — with roughly 12 m range.

The important caveat: Sengled bulbs are Zigbee end devices, not routers. They will not relay traffic for your sensors. If mesh strength is part of why you are buying Zigbee bulbs, this range specifically does not deliver it.

  • Wide range from filament to RGB
  • Built-in energy metering on most models
  • One model has an integrated motion sensor
  • Bulbs do not repeat Zigbee traffic, so no mesh benefit

The wall switch problem

This is the single thing most likely to make you regret smart bulbs, so it is worth stating plainly: a smart bulb is a computer that needs constant power. Cut power at the wall and it is not “off”, it is gone — unreachable by app, schedule or automation.

There are three real fixes. Leave the wall switch permanently on and control lighting by automation, voice or a wireless button — simplest, but hard on guests and housemates. Replace the switch with a smart switch or dimmer that cuts the circuit intelligently rather than dumbly. Or physically remove the switch mechanism and stick a battery-powered wireless button in its place, which looks identical and behaves properly. The third option is the one most experienced installers choose.

Any Matter-certified bulb will work. Beyond the brands above, any bulb carrying Matter certification pairs with a Matter-capable hub without the manufacturer’s app in the loop. That opens up budget Matter-over-Wi-Fi ranges from TP-Link Tapo, Linkind, GE Cync and Zemismart. They are fine for secondary rooms; just remember Wi-Fi bulbs never help your mesh.

Further reading

Frequently asked questions

Do smart bulbs work if the wall switch is off?

No. A smart bulb needs permanent power to stay on the network. With the wall switch off it cannot be reached by app, schedule or automation at all. Leave the switch on, replace it with a smart switch, or fit a battery-powered wireless button in its place.

Are Zigbee or Thread bulbs better than Wi-Fi bulbs?

For most homes, yes — not because the light is better, but because mains-powered Zigbee and Thread bulbs act as routers that relay traffic for your battery-powered sensors. Wi-Fi bulbs add clients to your router and contribute nothing to your mesh. The exception is Sengled, whose Zigbee bulbs do not repeat traffic.

How many lumens do I need?

Roughly 800–1100 lumens per fitting in a living room, 400–500 in a hallway, and up to 450 for a GU10 spot. Lumens measure light output; watts only measure electricity used, so ignore watt-equivalent marketing and read the lumen figure.

Is it worth paying more for high CRI?

In kitchens, dining rooms, bathrooms and anywhere you look closely at food, fabric or faces, yes. CRI above 90 makes colours look truthful. Below 80, wood and skin tones look flat and grey. In a hallway or utility room it makes no practical difference.

Do I still need a hub if the bulbs support Matter?

You need something that acts as a Matter controller and, for Thread bulbs, a Thread border router — that is normally your smart home hub. What you no longer need is the manufacturer’s own gateway, which is the real saving. Philips Hue is the exception here: its bulbs still route through the Hue Bridge.

Terms explained

Lumens (lm)
The actual amount of visible light a bulb produces. This is the number to compare between bulbs; wattage only tells you how much electricity is consumed.
CRI (Colour Rendering Index)
A 0–100 score for how accurately a light source reproduces colour compared with natural daylight. Above 90 is very good; below 80 makes skin tones and wood look washed out.
Colour temperature (Kelvin)
How warm or cold a white light appears, measured in Kelvin — roughly 2200 K for candlelight, 2700 K for a traditional warm bulb, and 6500 K for cold daylight. Tunable white bulbs can move across this range.
Mesh router
A mains-powered device that relays radio traffic on behalf of other devices, extending the network’s reach. Battery devices almost never do this, so a house with no mains-powered Zigbee or Thread devices has a weak mesh.
Power-off memory
A bulb setting that determines its state after mains power is restored — either its previous state or full brightness. Without it, a power cut overnight switches on every light in the house.

More terms in the smart home glossary. Related questions: What is the difference between a smart plug, a switch module and a smart bulb? Should I buy smart bulbs or smart switches?