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LIFX Original A21 Wi-Fi Smart LED Light Bulb, Multicolour, Adjustable, Dimmable, No Hub Required, Pearl White - Edison Screw E27 [Energy Class A]

3.9 out of 5 stars 145 customer reviews
| 33 answered questions

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E27 Single Pearl White
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  • Control home Lighting with Smartphone or Tablet
  • 16 million colours
  • Easy to install
  • Energy efficient LED light bulb
  • Equivalent to a 75 watt incandescent light bulb but 4 to 8 times more efficient

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Product Information

Colour: E27 Single Pearl White
Technical Details
Brand Lifx
Item Weight290 g
Product Dimensions6.5 x 6.5 x 13.5 cm
Item model numberBUL-11-A21E27-W
Part Number BUL-11-A21E27-W
Weight 290 Grams
Number of Items1
Colour E27 Single Pearl White
Shape Straight
Material Metal
Number of Lights 1
Voltage 230
Batteries Included?No
Batteries Required?No
Type of Bulb LED
Cap Type E27
EU Energy Efficiency Label A
Luminous Flux 1017 lumen
Wattage 17 watts
Wattage 17 watts
Incandescent Equivalent 1000 watts
Colour Temperature 9000 Kelvin
Beam Angle 130 degrees
Additional Information
Best Sellers Rank 15,162 in Lighting (See top 100)
Shipping Weight440 g
Date First Available10 Feb. 2014

Important Information

Light Bulb Recycling
View recycling information for this and other types of lamps.

Light Bulb Breakage and Clean Up Information
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Energy Efficiency

Lamp efficiency is rated on a scale of A to G 
Lamp efficiency is rated on a scale of A to G A

Product Description

Colour:E27 Single Pearl White

Product Description

LIFX is a Wi-Fi enabled, multi-coloured, LED light bulb that you can control with iPhone, iPad, Android smartphone or tablet.;LIFX uses a free app to customise bulb, letting you remotely turn lights on and off, dim the brightness and change the colour, so you can set the mood whether you're waking up in the morning or entertaining a date in the evening.;LIFX automatically connects to wireless network, making set up easy and can be used in conjunction with multiple LIFX bulbs in one room.;This energy efficient bulb consumes between 0.2W and 17W, depending on brightness level and can last up to 40,000 hours, or 25 years based on 4 hours use a day. With 4 hours use per day, LIFX bulb will pay for itself in approx 4-5 years and will reduce green house emissions by about 80kg per year. It features a brightness level of 1,017 lumens, which is similar to a 75 watt incandescent light bulb but 4 to 8 times more efficient.;Please note: Wi-Fi features require an 802.11b/g/n compliant router in range of a bulb and either iOS 6.0+ or Android 4.0+ on tablet or smartphone. LIFX bulbs are not intended for use in weather exposed areas

From the Manufacturer

Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Colour: B22 Single Pearl White Verified Purchase
Ok, let's make this brief(ish), as there are already good reviews and I don't have hands-on experience with any of the alternatives.

Good points:

+ *Incredibly* vivid colours in all hues, including green. Whether or not you'll actually find them useful is up to you. Does very good pastel colours too. Seriously, I can't emphasise this enough: pinks, reds, yellows, oranges, blues, greens, purples, cyans, and white tinted with all of those; they all look fantastic. I'd find it hard to believe that other similar bulbs on the market will give you that range; most won't reach to the greens.
+ Cloud allows internet control, timers etc. via IFTTT or via your own programming, if you understand how a REST API works. Programming your own dawn on a Raspberry Pi? Not a problem. If you're not a coder, IFTTT simplifies matters up to the point of being ridiculously easy.
+ Want your lights to notify you if you get an email, facebook post, tweet, etc? Not a problem.
+ I've had no connectivity issues whatsoever. YMMV, but they always connect reliably for me. (5 GHz not supported unfortunately).
+ Real whites. No, not the whites made by combining colours like on cheapy bulbs, but real ones. And they scale from the warmer whites to the colder ones pretty damn well.
+ Solid and well made.
+ Well designed in terms of use. There's no goofyness here: if you switch the bulb off and on using the actual socket switch, they will go on to whatever you last set them to. If you do it rapidly, it will go to white, full brightness. This is worth a lot more than it looks; for example, if you get bored of it being a gadget, it can be a normal bulb for you instead.
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Colour: E27 Single Pearl White Verified Purchase
I've been tempted to try one of these bulbs for a while, and with the price now half what it was on release, I decided to make the jump.

The packaging for the bulb looks great, and the bulb is well protected. On opening, the bulb itself looks very stylish, being the well made high end item that the price indicates.

Setting up the bulb on WiFi was very straight forward, the only slight negative was that the bulb needed a firmware upgrade to use the newest features, and this took approximately 20 minutes.

The app itself is very intuitive. It allows your to add a bulb to a group and name it - for example, "living room", "Corner Lamp". You can next either keep the bulb on the white light spectrum, changing it's intensity and warmth / coolness or jump into the coloured features.

I chose this bulb over the others on the market, as in tests I've read, it had a much greater range and depth of colours compared to the other coloured LED bulbs. Setting the bulb intensity to 50% or lower produces vivid, rich colours, whereas above that, more white light is added to the colour, increasingly so until the luminosity is at 100%.

What makes the bulb extra special is it's ability to integrate with IFTTT. IFTTT (if this then that) is a free website which allows you to create events and responses. Within 10 minutes I'd hooked it up so that if my next protect smoke detector detects carbon monoxide, it will breath the bulb yellow 20 times. If it detects smoke, it'll switch the bulb on and set it to red.

For fun, I hooked it up to my wifes iPhone GPS, so when she leaves work at night, the bulb breaths 5 times, so I know to get things ready.
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Colour: E27 Single Pearl White Vine Customer Review of Free Product ( What's this? )
When I first saw it I thought this brilliant idea would be the most fantastic thing to install in the house, and wishful thinking suggested it might be controlled by the network server even when we were out.

Alas I was mistaken. Without us having access to an iOS device, and being constrained to just PCs and Android, it has turned out to be no better than just another LED light bulb for us. I hope that the software will be improved so that we can use it as intended; then I might give it another star.

1. Software problems with Android app.

While I could make the network recognise the bulb after assigning its MAC number (printed on the bulb base) to a Static IP address in the router, and I then managed to get the wifi WPA2 password into the bulb, according to the Android app on my Samsung tablet, thereafter the app merely sat and waited to verify, and then eventually said it had failed. I deleted the app completely (not just 'Uninstalled') and re-downloaded it from Google Play store. Same results. After a couple of hours browsing the LIFX website support and trying everything I've given up and hard deleted the app again, partly because I do not like the permissions it has assumed in being able to take over the tablet, and partly because 'Uninstalling' it does not remove it - and I don't trust badly written software.

The little reset switch on the side of the bulb case does seem to have an effect: nothing to start with out of the box but a three pass flick reset it into factory defaults which enabled it to talk with my router (TD-W8970). Subsequent resets merely take one around the same annoying loop of failure again, a small tool is needed because after a few minutes the bulb's back-shell is much too hot to touch.
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