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50w, 36 degree, mains halogen - 240v, GU10, 2,700 kelvin


GU10, mains 240v Quartz Halogen lamp are fully dimmable and require no transformer to run them. Compared to a low voltage MR16 lamp the mains GU10 lamp produces about a third less light, the lamp does not last as long and there is fewer beam angles to choose from, but they are cheap to buy and you can retrofit the lamp with a LED  GU10 to reduce running cost's and increase lamp life. The LED GU10 is also available in a cool white. Some GU10 LED lamps can also be dimmable with a trailing edge dimmer. There are also ECO energy saving mains GU10 lamps available.

Input voltage
240 volts

Lamp type
50 watts

Beam angle
36 degree

Colour ( kelvins )
warm white,  2,700 kelvins

LED Replacement alternative to GU10 Halogen lamps



                         


Lamp colour ( Kelvins )

The colour of a lamp is defined as a measurement called kelvins. A standard GLS light bulb in your house would be 2,700 kelvins which is in the warm colour spectrum and a lamp with 6,000 kelvins would be at the very cold white spectrum. Getting the right colour temperature of a lamp does matter as the warm coulour wavelength helps to soften skin tones and gives a warm soft relaxed feel and at the other end of the scale a 4,000 to 6,000 kelvin lamp colour  would be used in offices or a fast food restaurants to make you feel less comfortable and relaxed and more alert. There‚Äôs nothing that can sour your opinion of a compact fluorescent  or LED lamp like buying a 4000K or 5000K bulb when you meant to buy a 2700K bulb, or vice-versa. When you buy a new, energy efficient bulb, keep your application and color scheme in mind and make sure to buy the bulb with a color temperature to match.           

                                                         Lamp colour temperatures in kelvins


 

Light output ( Lumens )


The amount of light that is produced by a lamp is called lumens and the more lumens the lamp has the brighter it will be. Lumens work in conjunction with kelvins and watts should not be taken in isolation of each other, for example if you had a very warm white lamp at 2,700 kelvins and it produced 300 lumens and you then had another lamp which was a cool white 6,000 kelvins which also produced 300 lumens the cooler lamp colour would always appear brighter to the naked eye than the warmer one this is due to the receptors in the eye that react better to a white light spectrum. Another factor on how bright a light may appear is contrast so if you shine a white 6,000 kelvin light on to a dark wall and a warm 2,700 kelvin lamp on to a white wall the warmer lamp would appear brighter due to the contrast of the material it is focused on. So when choosing a lamp always take in to account the area you want to illuminate and think about Kelvins ( colour ),  Lumens ( brightness) and contrast  ( colour of area )  The more lumens produced per watt the more energy efficient the lamp will be, for example you can have a 25w candle lamp that produces 170 lumens or a more energy efficient 18w candle lamp that produces 180 lumens so even though the wattage is smaller the lumens are greater which makes it use less electricity. That's what makes LED lights so energy effective as they can produce 700 lumens from a 5w lamp.

Light intensity or Light levels ( LUX )


Light levels are measured in something called LUX. Put simply LUX is a measurement of light falling on a given surface area. For example an average LUX of 200 would be needed for an outdoor tennis court for recreational purposes and a side street  walkway would have an average of 5 LUX. To calculate lux levels you need a very good calculator or computer as there is a number of factors that need to be taken in to account.Lux levels can be effected by a beam angle of a lamp, for example if you had a 50w 38 degree MR16 halogen lamp at 3 mtrs from the floor and another 50w 10 degree MR16 lamp placed next to it, the one with the 10 degree beam angle would record a higher lux level due to the concentrated light in a small area so you could drop the 50w lamp to a 35w lamp to save energy and still achieve the desired light level. 

             

The same wattage lamp ( 50w ) has been used in each of theexamples above and the only change is the beam angle of the lamp which raises the intensity ( Lux )  le