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Dimmers, Switches & Controls - Comparison

Smart bulb vs smart plug for a lamp

By Sawyer V. ยท Last verified September 11, 2026

Both make a lamp smart. One changes the light itself; the other only changes when it is on.

A smart plug beside other smart home devices on a wall

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#ProductBest forLumensPrice
01

TP-Link Kasa Matter Smart Plug EP25

Making a lamp smart without changing its bulb

Plugs in. No wiring, no switch change, nothing fixed.n/a - controls a lamp, does not light
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02

LIFX LIFX A19 Smart Bulb

Color range and brightness without a bridge

A bulb swap on your own Wi-Fi. No hub and no wiring.1,100 lm
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03

TP-Link Tapo P115 Smart Plug

The same job on the newer app

Plugs in. No wiring, nothing fixed, comes with you.n/a - controls a lamp, does not light
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04

WiZ WiZ Connected Color A19 Smart Bulb

The cheapest way into hub-free smart lighting

A bulb swap on your own Wi-Fi. No hub, no wiring, no switch change.Not published
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05

Philips Ultra Definition A19 LED, 60W equivalent, 2700K

The default bulb for almost every lamp in a home

It is a bulb. Swap it, keep the old one, put it back when you leave.800 lm
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Specifications are the manufacturer or retailer published figures, compiled by hand. We have not measured them, and where a figure is not published we write "Not published" rather than guess.

01

The decision, in one table

Smart bulb against smart plug, for a lamp.
Smart bulbSmart plug
Light qualityWhatever the bulb is - CRI often not publishedAny bulb you choose, e.g. CRI 95
DimmingYes, in the app or by voiceNo - on and off only
Color and warmthTunable, often full colorFixed by the bulb you fit
Lamp with 3 socketsThree smart bulbsOne plug
Energy monitoringNoYes, on the EP25 and P115
Lamp switch turned offBulb goes offlinePlug cannot turn the lamp on
Renter-safeYesYes

Plug if you care about the light; bulb if you care about control. A smart plug leaves the light quality to whatever bulb you put in the lamp. A smart bulb gives you dimming and color, and takes whatever light quality its maker built in.

02

Where each one wins

Light quality: the plug. Most color smart bulbs do not publish a CRI figure at all. A Kasa EP25 or Tapo P115 smart plug lets you keep a Philips Ultra Definition at a published CRI 95 in the lamp and still put it on a schedule. The plug picks are in best smart plugs for lamps.

Dimming and color: the bulb. The smart plugs here switch only. A LIFX A19 dims and tunes from warm to cool in the app, and it is one of the few color bulbs that publishes both its output (1,100 lumens) and a CRI of 90+. The WiZ color A19 does the same job for far less, without published output figures.

Lamps with several sockets: the plug. An arc lamp with three heads or a floor lamp with a reading arm needs one smart bulb per socket, and they all need pairing. One plug controls the whole lamp.

Knowing what a lamp costs to run: the plug. Both the EP25 and the P115 monitor energy, which is how you check a running-cost figure yourself - the arithmetic is in what it costs to run your lights.

03

Who each one is for

Choose a smart plug if the lamp already has a bulb you like, you only need it on at sunset and off at bedtime, or the lamp has more than one socket.

Choose a smart bulb if you want to dim from bed, shift the light warmer in the evening, or use color. Those are things a plug cannot do.

Choose a plug-in dimmer if what you actually want is dimming, not scheduling. It dims any dimmable bulb with no app - see plug-in dimmers.

For hardwired ceiling lights the question changes, because a plug cannot reach them - that comparison is in smart plug vs smart switch.

The picks

The products behind this page

01

Making a lamp smart without changing its bulb

TP-Link Kasa Matter Smart Plug EP25

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Matter native with no hub and built-in energy monitoring, at roughly the price of one smart bulb - and it works with whatever high-CRI bulb you already chose.

Lumensn/a - controls a lamp, does not light
Color temperaturen/a
CRIn/a
Power sourcePlugs in between the lamp and the outlet
DimmableNo - switches only. Dimming stays with the bulb.
Renter-safe methodPlugs in. No wiring, no switch change, nothing fixed.

What it gets right

  • Matter native, so it answers to Alexa, Google Home, Apple Home and SmartThings with no hub
  • Energy monitoring built in, which is how you check a running-cost figure yourself
  • Works with any bulb, so light quality stays your decision

What it costs you

  • Switches rather than dims - a dimmable lamp still needs a dimmable bulb
  • Occupies the outlet, which matters on a crowded power strip
  • Energy monitoring on budget plugs is approximate, not metering-grade

Spec source: Engadget best smart plugs (attributed) - retrieved September 3, 2026.

02

Color range and brightness without a bridge

LIFX LIFX A19 Smart Bulb

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1,100 lumens and CRI 90+ with no bridge required - the one hub-free bulb bright enough to be a room's actual light source rather than an accent.

Lumens1,100 lm
Color temperatureTunable white plus color
CRI90+
Power sourceScrews into a standard E26 socket
DimmableYes - in app
Renter-safe methodA bulb swap on your own Wi-Fi. No hub and no wiring.

What it gets right

  • 1,100 lumens - genuinely enough to light a small room from one socket
  • CRI 90+ published, unusual for a color smart bulb
  • No bridge to buy, power or find shelf space for

What it costs you

  • Two to three times the price of a WiZ bulb
  • Wi-Fi only, so it depends on router coverage
  • Still offline if someone kills the wall switch

Spec source: Smart Home Explorer guide (attributed) - retrieved September 3, 2026.

03

The same job on the newer app

TP-Link Tapo P115 Smart Plug

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The EP25's sibling from the same manufacturer with the same energy monitoring and Matter support, on TP-Link's newer app with cleaner energy dashboards.

Lumensn/a - controls a lamp, does not light
Color temperaturen/a
CRIn/a
Power sourcePlugs in between the lamp and the outlet
DimmableNo - switches only
Renter-safe methodPlugs in. No wiring, nothing fixed, comes with you.

What it gets right

  • Energy monitoring with a clearer dashboard than the older app
  • Matter support, so it is not tied to one ecosystem
  • Compact enough not to block the second socket on most outlets

What it costs you

  • Another vendor app and account if you already use a different one
  • Switching only - no dimming
  • Consumption figures on budget plugs are within a few percent, not exact

Spec source: Smart Home Explorer smart plugs guide (attributed) - retrieved September 3, 2026.

04

The cheapest way into hub-free smart lighting

WiZ WiZ Connected Color A19 Smart Bulb

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Wi-Fi and Matter with no bridge to buy, at roughly the price of two ordinary bulbs - the sensible default when you are lighting a rental you may leave next year.

LumensNot published
Color temperatureTunable white plus color
CRINot published
Power sourceScrews into a standard E26 socket
DimmableYes - in app
Renter-safe methodA bulb swap on your own Wi-Fi. No hub, no wiring, no switch change.

What it gets right

  • No bridge, no hub, nothing extra plugged into the router
  • Matter support, so it is not locked to one ecosystem
  • Cheap enough to do a whole apartment rather than one room

What it costs you

  • Wi-Fi bulbs each take an address on your network
  • CRI and lumen figures are not published per SKU
  • Anyone flipping the wall switch takes the bulb offline

Spec source: PCWorld smart bulb guide (attributed) - retrieved September 3, 2026.

05

The default bulb for almost every lamp in a home

Philips Ultra Definition A19 LED, 60W equivalent, 2700K

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800 lumens at 2700K with a published CRI 95 for the price of an ordinary bulb - the single easiest upgrade in this entire category.

Lumens800 lm
Color temperature2700K
CRI95
Power sourceScrews into a standard E26 socket (8W)
DimmableYes
Renter-safe methodIt is a bulb. Swap it, keep the old one, put it back when you leave.

What it gets right

  • CRI 95 at a mainstream price, which almost nothing else manages
  • 2700K matches the warm light most rooms were designed around
  • Dimmable and rated flicker-free

What it costs you

  • 800 lumens is one bulb's worth - a dark room needs several
  • 2700K is too warm for detailed kitchen task work
  • R9 is not published, so deep reds are an unknown

Spec source: Home Depot listing - retrieved September 3, 2026.

FAQ

Questions people actually ask

+Is a smart plug or a smart bulb better for a lamp?

A smart plug if you want to keep a high-quality bulb and only need on, off and schedules. A smart bulb if you want dimming or color temperature control from your phone or voice.

+Can a smart plug dim a lamp?

The smart plugs here cannot - they switch only. To dim a lamp without a smart bulb, use a plug-in dimmer instead.

+Which is cheaper, a smart bulb or a smart plug?

Per lamp they are similar - a good smart plug costs roughly what one smart bulb does. The plug wins for lamps with several sockets, because one plug controls every bulb in the lamp.

+Do smart bulbs have good light quality?

Some do, but most color smart bulbs do not publish a CRI figure. The LIFX A19 publishes CRI 90+; many others publish nothing, so a plain high-CRI bulb behind a smart plug is the safer route to good color.

+What happens if someone uses the lamp's own switch?

With either option, the lamp stops responding. A smart bulb loses power; a smart plug can switch its outlet but the lamp's switch is still off. Leave lamp switches on and control everything from the app or voice.

Sources

Where the numbers came from

All sources retrieved September 3, 2026.

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About the author

Sawyer V. An enthusiast who reads the spec sheets and does the arithmetic. No lab, no test bench.