16.12.2013

I totally support the idea of LED bulbs as an ideal solution to domestic lighting. Not only are they super efficient but the tehnology can be run from low voltage circuits which is great news for anyone generating their own power or living off grid. The problem so far has been that technical development has lagged market demand. Early versions were large and the light a horrid cold blue colour. Only with this new generation of product has it been possible for manufacturers to squeeze everything in to standard bulb sizes and to make a lamp with a pleasant warm coloured light output.What you get for your investment is a very well made an elegant looking bulb that fits directly in to an existing 240V GU10 halogen bulb fitting with no modification needed.LEDs are low voltage devices but this is a "chip on board" device that steps down the mains voltage internally without the need of a separate transformer. The bulb runs cool and the light output is indistinguishable from my existing halogens - a point that impresses me greatly. The perforated ring around the lens is a grey silver colour, whereas most folks have white ceilings and white fittings. I wish the ring was white so it did not stand out quite so much. The ring is there for cooling by the way, and it's a common misconception that LEDs do not heat up. They do, but a lot less than halogen. Lack of cooling can over time cause an LED bulb to fail prematurely or the light to gradually change colour from warm to cool blue, so clear any stray insulation directly behind your fittings.Overall this lamp is superb, and I'm delighted the era of viable LED lighting is here at last! All we need now is for the price to come down, at which point LED lighting will become the standard, replacing halogen just as halogen replaced filament bulbs. At current prices it's more of an early adopter item so we have a way to go yet before LED becomes universal.In the meantime, no matter how "eco" a product sounds it's always sensible to perform a cost-benefit analysis. Despite a product promising huge energy savings you'll only recoup your investment if you use it enough for the savings accrued to be greater than the purchase cost. This principle becomes especially important for high cost items such as this light bulb. It claims an 80% energy saving (more like 88% by my calculation) but a standard 35w halogen bulb can be had for 60p, so we need to do some maths before making a purchase.Electricity currently cost me 14.5p per unit, so if I'm saving 31 watts by buying this item I'll need to consume 122.48 kWh in order to recoup the purchase price. And that will take me 3,951 hours! Obviously everyone uses their lighting differently, so you'll need to make up your own mind based on your own circumstances and useage. But what's clear is that at current prices it's unlikely you'll save anything by fitting these in a cupboard or spare room. To have a chance of recouping your money you need to put them in high use public areas. That advice could easily change though if enough people buy them and the price comes down. Here's hoping.

7.12.2013

It's a little hard to justify the extremely high price for these bulbs.Yes they are bright, equiv about to a 35 watt halogen and bulkier and heavier too for ceiling fixings.Early adopters will love them; but they are likely to drop dramatically in price over the years (like CFLs did)so you would be unlikely to ever re-coup your purchase price, unless you have these on ALL day long - then its worth considering.One interesting thing most people do not know about these bulbs,is they may be 'dimmable' but the effect is totally different from ordinary bulbs when dimmed. A ordinary bulb 'yellows' as it is dimmed (light spectrum output changes,

31.12.2013

Excellent build quality and look very smart. I have normal Halogen spots in various places in the house, and they consume quite a bit of electric, get very hot, and seem to blow regularly. These LED spot bulbs answer all those questions, consuming some 85% less electric, do not get excessively hot and have a life expectancy of 15 years.This is the 4W (equivalent to 35W) warm white (2700K) version. It's incredibly bright, don't look directly at it. I would say it's brighter than a 35W Halogen, but the light beam is more focused, so you get much more of a `spot' compared to Halogen. The warm white is a yellower shade than normal halogen spots, and are the ideal replacement for the existing standard Halogen bulbs in my bedroom,

5.2.2014

I’ve tried a number of LED lamps – GU9, GU10 and others. This is one of the few that I've been happy to continue using. With others, the output often doesn't match the claim, the light characteristics are unpleasant, or they’re too big. This one is far from perfect but I find it acceptable and like the fact that it’s dimmable.Philips claim 275 lumens and 35W incandescent equivalence; I’d put it closer to 30W, which the light meter in my camera seems to confirm when I photograph objects under it.Some people complain that the light it produces is too cold but I like it, especially for task illumination – reading, sewing,

7.1.2014

Expensive if thinking of buying but they do give out a clear bright light, without the time lag of other energy saving light bulbs. No hot light fittings either or marks on the ceiling from the heat emitted from them when on.I only wished that I could find some screw thread ones for my other light fittings in this range then I could slowly but surely replace all the light bulbs with energy saving ones. Joking apart the five bulbs well ten in total (five on each side of kitchen) do use a lot of electricity over time with ordinary bulbs especially if left on a lot like our are, these bulbs over a year will cut down on the amount of electricity used which is a good thing.

20.2.2014

I received this free through the Amazon Vine review programmeI can honestly say that I would not have paid this much for a single lightbulb, LED or otherwise. I have replaced lots of lightbulbs in my home with LEDs - both dimmable and non-dimmable varieties and over the last couple of years have noticed clear improvements in the technologies.The warm white colour of this bulb isn't as warm as the light output by bulbs I had purchased from another brand, but is noticeably on the yellowey side of the spectrum. It's a decent bulb and over a few years would pay for itself (had I purchased it).However, there are less expensive LED halogen replacements (including dimmable ones) on the market.

18.12.2013

This is the updated 35W equivalent GU10 bulb in the Philips Master LED range, which Philips claims offers increased lumens output and improved dimmable range whilst using less power than the old one. Whilst I can't speak for its dimmable range as I don't have any GU10 lighting circuits on dimmers, I can certainly tell that the lumens has improved. I will have to take their word for it on the reduced wattage, but as a lot of modern houses make heavy use of GU10 lights, every little helps.The two other features of this range that I like are the high quoted hours of 40,000 hours which is very good, plus the vents around the face of the bulb. The latter feature is reassuring as LED bulbs can still get warm,

17.12.2013

I'm planning on gradually replacing all my old GU10's with these, they are solid and even though they are models that are slightly different in look they all are exactly the same size. They overall look different from the slightly older LED bulbs so in spot lighted fittings you can see the difference in look, even if they shine just as bright.Another thing which is great is there is no 'lag' from when the switch is flicked and the light turns on, in fact I reckon even I could fulfil Ali's boast by flicking the switch and be in bed by the time the light turns on (compared to the older generation of LED).The prices of the individual bulbs may shock slightly and they most probably will gradually creep down as they get more popular.

10.12.2013

I'm very impressed with this bulb, having replaced a dead 35W halogen spotlight, in a light fitting containing two other 35W lights. It is easily as bright and white (if not, brighter and whiter) than the other bulbs in the fitting, and puts out far less heat.As another reviewer has mentioned, though these bulbs are dimmable, they don't dim in the same fashion as traditional bulbs. With a traditional halogen spotlight, the light becomes warmer and more yellow when dimmed, whereas these just put out less light.The cost is also prohibitively expensive. I'm sceptical as to whether or not I will see the cost saved over the life time of the bulb, especially when traditional halogen spotlights are so cheap.

14.4.2015

Slowly replacing my yellow lights. I find this bulb a good compromise from the old yellow to the new harsh white lights out there. I used to like the relaxing tone of my dimmable yellow lights and found the new ones I tried out there very harsh cold clinical white. This one is a happy medium. With replacing them slowly one by one (4 lights on one dimmer) the new lights look much better and even though they are only 4w equivalent to 35w they are quite bright, whilst still being able to dim very low. Upon replacing the 4th bulb in the dimmable set we found the 4th one flickered a little but we have found out that we need a different compatible dimmer switch.

16.5.2014

Due to the fact that I work in the construction industry & in particular electrical engineering it's a widely recognized fact that when installing lamps of any variety, it's a far better idea to spend a little extra on a reputable brand as more often than not you will save money & this lamp would appear to be the perfect example.I've sometimes chucked a super-market or DIY store branded lamp into a fitting only to find it blowing far sooner than it should & occasionally had lamps actually damaging an expensive light fitting - having installed these Philips spots in a John Lewis kitchen fitting I'm more than pleased with their performance & additionally,

13.1.2014

I am gradually replacing all of the standard GU10s in my house with their LED counterparts - not initially because of the energy saving but because I was tired of seemingly constantly replacing standard GU10s!The philips units have worked well so far, with no failures, and the light that they give is bright, smooth and certainly not a stepback from a normal GU10. One thing I have definitely noticed is that the fittings are a lot, lot cooler to the touch with these LED units - my old kitchen spot fittings had been discoloured by the heat of normal GU10s, heat that is literally a waste of money!My only reservation is that these are a lot more expensive than a standard GU10,

1.1.2014

These Philips LED GU10s are among the very best on the market. The warm white (2700K) variant produces a superb quality light, bright with a hint of warmth. If anything slightly better than the halogens they replace. This 4w bulb is equivalent to 35w halogen and is really too dim for use in the kitchen in my opinion, with a 50w equivalent being a better choice. In a bathroom or dining or living area however they are perfect, giving a bright useable light without being too brash and blinding.These lights feel highly engineered with their silver parts and ventilation holes. That doesn't really matter when they're up in the ceiling,

16.12.2013

We have spot lights in our kitchen, three lamp-fittings with three spot-lights on each. Until now we have used halogen bulbs and have been disappointed because they don't last long and we have had to replace at least one of them every couple of weeks (which works out fairly expensive and on average the bulbs seem to be lasting about 5 months each). I was pleased to see that these LED energy-saving bulbs have the same fitting so I am trying one to see whether it lasts any longer. As the cost of this bulb is 6 times as much as the halogen bulbs I am expecting not to have to replace this one for nearly three years. The light it gives out is clear and bright.

17.12.2013

and frankly the title says it all. However, I like the Star Trek look about the face of the bulb...very high tech to look at.Other than that I works like a charm though I still can't grasp the idea of the cost of these bulbs. They may very well save you money on your energy bill but this saving is lost at the front end, when you buy it. This bulb is eyewateringly expensive at just over £18 and that's reduced here on amazon...why? Why so expensive? Imagine you have a house full of bulbs like this and you intend replacing each of them with this bulb...new mortgage Sir?In summary, good build quality, great light but the cost keeps me away.

Philips MASTER LEDspotMV D 4-35W GU10 827 40D - Reviews

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