Often is his gold complexion dimmed…

Zetalux 7W light bulbA package arrived today; a small but heavy one, containing my first LED lightbulbs. No, not the little ones that go in torches, but big ones designed to replace the 240v tungsten bulbs in my ceiling light fixtures. Michael had found a good UK supplier, and I wanted to experiment with what I’m sure will be the way we all light our homes five to ten years from now.

As I’ve written before, I don’t really like the CFL (compact fluorescent lamp) bulbs that have been the only real low-energy option in the past. You know, the ones that look like some sort of lower intestine curled up where the bulb should be? Firstly, they’re a nasty colour, though much improved now. Secondly, they take a while to warm up to full brightness. Thirdly, they may use less power but they contain nasty chemicals which leads some people to question how environmentally friendly they are overall, and lastly, you can’t use them with dimmer switches, which rules them out for about half of the rooms in my house. Not just dimmers, either, some other electronic switches (like electronic timers) also don’t work. I’ve put a couple of these bulbs in, and I’ve sort of become used to them, but it’s really a case of how much I’m willing to sacrifice for my moral obligations, rather than something I do with joy.

LED-based bulbs, on the other hand, use even less power, are probably more environmentally friendly to manufacture, supposedly last for somewhere between twenty and forty years, and are available in dimmable form. It was time to try them, so I ordered three different ones, even though they cost £25-£35 each. So, after a quick try, what’s the verdict?

Well, the good news is that the brightness is really quite impressive. Anything over about 4W is a viable replacement for a 50-60W bulb, so, yes, they use about 10% of the power of a conventional bulb, and about half that of a CFL. These are also well-made, as they should be for that price. In five years’ time, when we’re buying cheap LED bulbs for a few quid, we’ll be amazed at the robust construction techniques used today. They hit full brightness immediately and the dimmable one worked nicely with my dimmers. All good so far.

However, I’m not sure that any of them will find a permanent home in my light fixtures yet.

Firstly, they’re too white. They don’t have the bluey-green tint of some CFLs, but they are still very white. This may be something I’ll get used to over time, but if you’re thinking of buying any, be aware that those labelled ‘warm white’ are still not nearly as warm as a tungsten bulb. They’re fine if you’re keen to simulate daylight in your sub-basement, but not if you’re after that cozy, welcome-you-home-on-a-cold-winter’s-night look. Particularly if you mix LEDs and traditional bulbs in the same room, you’ll notice the difference. Fortunately, manufacturers and suppliers are starting to publish the colour temperatures – don’t trust anything described as ‘warm’ if its temperature is over 2800K, and even 2800K leaves something to be desired.

But that’s not the main issue. The main issue is that, while a glowing filament emits light in all directions, LEDs are very directional. They therefore make good spotlights, which is why LED bulbs have chiefly been sold with GU10 connectors, as used by the little spotlights that have been embedded in everyone’s ceilings in recent years. There, I can imagine they work well, and are worthwhile because, charming as those lights are, they’re not a very efficient way to light a room. When my existing GU10 bulbs give up the ghost, I’ll replace them with LEDs. But most of my house has light fixtures – some of them antique – which make it rather obvious if only the top half of the bulb is emitting light and most of that light goes in one direction. The very unexciting paper globe shade above me, which I’ve been planning to replace for about 7 years, if fitted with an LED, does a very good job of lighting the floor in the middle of my small study but leaves the periphery in shadow. The main glass fitting in the centre of the dining room has two bulbs, side by side, mounted horizontally. With LED bulbs, this lights up the walls but not, to any great degree, the table. It looks very strange.

Until this is sorted, I’d need two or three times as many lights in every room to get reasonable coverage, which undoes some of the benefits. CFLs are better, but I can’t use those because of my dimmer switches. And the 7W bulb pictured above, which was intended to go in an Ikea R80 spotlight fitting at about eye-level on the kitchen wall, is a good, bright bulb but I can’t use it because it’s the wrong shape: the dome of the bulb extends beyond the lampshade and so is dazzling. Ironically, the one good spotlight-based experiment fails because the bulb sends light in directions I don’t want it to go!

So, my advice is, if you’re willing to pay a lot, these bulbs are starting to become quite good. But unless you’re planning to use them as ceiling-recessed spots, you may need to budget for new light fittings as well. Still, look on the, ahem, bright side. At least the fittings may cost you less than your lightbulbs!


Having been through a similar process over the last year, and bought lots of kinds of CFL and LED bulbs and then slowly had to get rid of them all, I had a thought. The problem is that the people who sell the bulbs are very functional, technical, price-conscious companies. The people who sell light fittings on the other hand (and design them) tend to consider interior decoration, aesthetics, the affect the light will have on mood and the look of a room, and so on. This never used to be a problem with incandescent bulbs as they were consistently good (in terms of the light they gave out) and the rest of the infrastructure (dimmer switches etc) grew up around them so it all tended to work most of the time without much trouble. But with all the low energy options out there now (and perhaps it is a year or two too early still) you can’t mix and match quite as freely.

So all we really need surely is someone with a design and aesthetic view on lighting to produce a range of low energy bulbs that actually work – with a high CRI, good colour temperature, dimmability, and so on. At the moment it is hard to even get this information, let alone to have someone’s assurance that a bulb will look good. Anyway, good post, rant over, if you want to start the company let me know 🙂

Good warm color of led bulbs is 2600K. Also dimmable led bulbs require different dimmers. If the led bulb flashed when dimming, its possible that you have to change the dimmer switch.

Things are moving on: http://www.meethue.com/

Price is a bit painful…

Yes, looks quite pretty…

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