How to Choose a Light Bulb

On the market there are various opportunities for lighting, whether for home, common areas, outdoors or in the office. Each option has strengths and weaknesses, so it is good to learn more about them and so make the right choice.

Incandescent Lamps

These are classic light bulbs used for decades – the most inexpensive production and low energy efficiency. They were banned for lighting in households in the EU, US, Australia, Canada and others. However, it disappeared from the commercial and now held special purpose lamps. Their operation – wire protected by a glass bubble filled with buffer gas is heated by electric current through it and starts to emit visible light. When these bulbs is possible effect of dimming, because when they are fed less electricity, they shine less. Rotating switches on and off do just that.
– Bright, strong and warm light (2700K) with continuous spectrum.
– When switching instantly earns.
– Wide range of light in almost all directions.
– Supported dimming.
– Low price production and final product.
– Do not use hazardous materials to make.
– Approximately 95% of the consumed energy is released as heat and only 5%.
– Hence undesirable effect during the warmer months.
– Short service life of around 1000 hours and little life of about 4000 cycles on and off.
Halogen lamps are also incandescent, but with some differences. The used wire is thinner and placed in a small capsule filled with halogen gas. This achieves a higher temperature, leading to more intense white hot light with lower energy consumption.
– Bright, strong, warm light (2700K – 2800K).
– Instantly earns full capabilities. – wide range of light in almost all directions.
– Dimming are supported.
– Lower power consumption. 20-30% savings depending on the power.
– Longer life at work by about 2000 hrs. And longer life, expressed in cycles incl. / Off.
– Range from 7000 to 50 000.
– safe materials that can be recycled.
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– Again much of the energy goes to heat a small portion of light, and hence similar deficiencies classical lamp.
– A sophisticated production, thus more expensive finished product. – more economical than conventional bulbs, but use more energy compared to alternatives considered below.

Luminescent / Fluorescent Lamps

These are the luminaries who represent pipes in various forms. Their operation: the glass tube has a gas mixture incl. mercury vapor and electricity them “drive” to produce ultraviolet light which excites fluorescence in a thin phosphor coating on the inside of the tube and thus produce a white visible light. After the ban on conventional incandescent lamps ie fluorescent replaced them in many places. Various scholars, however, reported alarming results of studies showing that this type of lighting is not suitable for use under certain conditions. The disadvantage is a flicker of light and although the human eye can not distinguish light and seems constant, it gets tired vision. According to the manufacturers this is a problem in older generations lamps or downgrades in modern, quality products using technology to eliminate vibrations and to make them undetectable by the eye. Another disadvantage is ultraviolet light (UV), which emit it may not be well tolerated by people with sensitive skin. It is recommended to have at least 50 cm distance between such a lamp and man. The light they emit can vary from warm (2700) to cold (6400). For people with significant vision cold light can be unpleasant.
– Wide range of light.
– Low power consumption. Up to 80% savings when compared with the classical lamp.
– Long life between 8000 and 10 000 h.
– Less heat and heat.
– Poor, uneven light spectrum, consisting of peaks from several colors.
– Cycles incl. / off. between 2000 and 5000, which in particular use can significantly shorten the life of the otherwise durable as hours of work lamp.
– When incl. it takes time to become fully operational. Depending on air temperature it can take from 10 seconds to 3 minutes.
– It contains hazardous substances such as mercury, that would be a serious risk to human breakage.
– Operating some of this type bulbs emit phenol and phthalate that could harm per person.
– The radiation in the ultraviolet can cause various side effects on health.
– It can not work with dimmer.
-The market has fluorescent lamps that are cheap, but this is due to poor quality workmanship, failure to comply with safety standards, lack of necessary protections.
– A sophisticated production and, once out of use should be treated as hazardous waste and be recycled through a special process.

LED Lamps (LED)

LED is a semiconductor crystal through which current can flow in only one direction and some of its energy is converted into light. It has a very narrow band, i.e., always has a certain color, depending on the type of semiconductor. There are red, yellow, green and blue LEDs. To obtain popular white light, which is available in stores, with a blue crystal that illuminates a special phosphor, and he in turn emits white light. A number of LED light from warm (2700K) to cool (6500K).
– When switching instantly earns full capacity.
– Long life of 10 000 to 20 000 h.
– Long life cycles ranging from 8000 to 70 000.
– Low power consumption. Up to 80% savings compared to traditional lamp, and more economical than fluorescent.
– Less heat, making them suitable for places where you need to maintain a low temperature (refrigerators, warehouses, etc.).
– More -resistant shock and vibration.
– Do not contain hazardous materials such as mercury.
– The spectrum of LED approaches the light produced by incandescent lamps.
– Some LEDs can be set to change color.
– The color temperature of light not as good as incandescent bulbs. LED now only approach as indicators to the classical bulb, and only some of them, while low quality models results are weak. Although the light appears white, some color components therein are more and others less. Color rendering index (CRI) shows how evenly the level of the different color components in the spectrum. In incandescent lamps CRI is 100%, while the LED is about 80% for ordinary and reaches over 90% at best. Downgrades have CRI below 80% as this light is unpleasant.
– No light uniformly throughout life and after a certain number (thousand.) Hours becomes weak.
– In working conditions at high temperature life decreases.
– Most LED are not dimmable. There are versions that support dimming, but they are considerably more expensive and not fully supported, because it can be reduced to 0% and only 15-20%.
– It can work with switches that have illuminated indicators.
– Low quality models have a high ripple. Such light is uncomfortable and tired sight.
– The light is focused and go in all directions. It may be from 120 degrees to 200 depending on the design.
– High price of the product.