Brilliant led (with no lag). 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. There are many different types so its worth looking at all the specs to make sure you’re getting what you want, but i’ve now tried out five different ones and they all work brilliantly and are mostly the same light and intensity.
As good as halogen but with the energy saving potential. Most led bulbs have to some extent a very much ‘whiter’ light than halogens, which are typically very yellow, or as some people describe it, ‘warm’. This has been a problem for people wanting to replace halogen bulbs with led bulbs for the cost savings, but not enjoying the whiter more clinical light. This bulb however has a very similar ‘colour temperature’ ( how white/yellow the light is) to a halogen bulb. Compared to my other led halogens it stands out as being much much more yellow. I imagine this took a lot of technical work to achieve, and it does feel like it brings led bulbs much closer to being mainstream. Light output is also very good and the spot size / brightness mimics a halogen well. In summary, this will appeal to anyone who wants an energy saving halogen and is offended by the usual whiteness of led bulbs.
Clean bright instant light, but horribly expensive still. 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, ie the measured kelvin becomes lower)leds do not do this; so the cosy effect of dimmed lights is totally lost. In fact its more like squinting your eyes and wondering why it seems darker. I do not like that feature at all and neither does anyone i’ve tested this onso the premium cost for dimmable leds seems rather pointlessif you use them for a few minutes at a time, they will last a long time; but you will never re-coup the initial cost. However there is no figures on the life longevity to the electronics caused by switching on and off regularly (heat stresses components and the solder joints). Fluorescents terminate their lives much much earlier if constantly switched on & off. Here are the specifications for the Philips Master LED GU10 Spot 4W:
- Philips Energy Saving LED Spot Light Bulb
- 4 Watt GU10, 2700K Warm White, Dimmable
- 275 lumen output, 900 candela, 40 degree beam angle
- Delivers a warm, halogen-like accent beam suitable for spot or general lighting
- 80% energy savings compared to 35W halogens. 40,000 hour life minimises maintenance cost
Plenty of light, no warm-up time and lower energy costs. 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 gu10sthe 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 moneymy only reservation is that these are a lot more expensive than a standard gu10, but they are cheaper to run and a lot more convenient as they haven’t so far needed to be changed at all.
Alternative to halogen bulbs. 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. We don’t have a dimmer switch so i can’t comment on what happens on this setting.
Reviews from purchasers :
- Good light output
- Good quality light
- Light ok, but not instant on
Brilliant but a bit too costly at the moment. . I’ve got a fair bit of experience with led bulbs now trying a number of different brands and also a few different philips ones. The philips ones are brilliant i can’t praise them enough, clean and bright light, just as good as a halogen but with long term cost savings on electricity, they give off much less heat and the bulbs have a much longer life cycle, years. So yes the initial cost is very expensive but the savings you make over the life cycle of the bulb would more than cover that. However that said i think i will still wait until they are sub £10 before i replace all the bulbs in my house.
Much more expensive than other led brands. 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. These too switch on immediately, generate warmish white light at roughly comparable levels to traditional halogen bulbs, yet use far less power. The only significant difference i can find between this bulb and ones costing less than half the price is in terms of projected lifespan. The philips bulbs are rated for around 25 years of life, whilst my cheaper bulbs are rated for around 20 years. Given the rapid improvements being made in this area of technology, i think i’ll stick with buying the less expensive bulbs for now.