The user guide to led bulbs | Blog home-of-led.co.uk
LED LIGHT TECHNOLOGY
LED has recently become the most efficient way of illuminating and has changed lighting as we know it. LED technology development continues to bring new light solutions which are energy saving, smart and eco-friendly. We’ve compiled this short guide to help you understand how you could benefit from making a switch from traditional incandescent, halogen or CFL bulb.
WHAT IS AN LED?
LEDs (light-emitting diodes) are semiconductor devices that produce visible light when an electrical current passes through them. In other words LEDs are a type of electronic light source. There are two most popular type of LEDs. One of them is SMD LED (Surface Mounted Device) which consist of one light-emitting chip with dimensions of 35 x 28m. The second most common type is COB (Chips on board) where LED chips are packed together as one lighting module making it look like a light panel. LED bulbs are far more efficient at converting electricity, measured in watts, into light, measured in lumens therefore using up to 80% less energy than incandescent of halogen bulb of equivalent brightness. LEDs are more durable, last longer and do not feature fragile elements such as glass or filaments. They are safer as well as they do not contain any mercury or lead and emit very little heat.
WATTS AND LUMENS
Till recently when choosing a light bulb you were probably looking for watts, an indication of how bright the bulb will be. When shopping for LEDs forget everything you know about good old incandescent, as your “watts” are no good at this point. Led wattage is not an indication of bulb brightness but the measurement of how much energy it draws. The new form of measurement indicating bulb brightness are lumens. Over many years we have been trained to think about light only in terms of wattages so it could be a bit tough to decide how many lumens do we actually need in a bulb. As such, a typical 6 Watt LED bulb can easily achieve a light output comparable to a 40 watt halogen or incandescent, sometimes higher due to its high lumen to watt ratio. Basically the higher the number of lumens, the brighter the bulb. So because comparisons based on wattage are no longer meaningful, the strength of new energy-saving light bulbs is expressed in lumens, which measures instead the amount of light they produce. For estimated watts and lumens conversion please see the chart below.
|2600 lm||150 W||25-28 W|
|1600 lm||100 W||16-20 W|
|1100 lm||75 W||9-13 W|
|800 lm||60 W||8-12 W|
|400 lm||40 W||6-9 W|
SUSTAINABLE LED BULB
LED Bulbs use up to 80% less energy than an incandescent or halogen bulb of equivalent brightness. By switching to LED, a considerable amount of money can be saved due to the lower wattages of the products. LEDs bulbs, thanks to their efficient thermal management which helps to slow down lumen depreciation last far longer, they don’t need to be replaced often and their reliability means that maintenance effort is minimal.
Led products are eco-friendly as they do not contain harmful mercury or lead. Using Led bulbs cuts carbon emission. They also emit very little heat. All Spectrum LEd bulbs and other LED products are designed and manufactured in compliance with RoHS and are marked with CE symbol. The production control systems and checks are constantly carried to ensure compliance with The Restriction of the Use of Certain Hazardous Substances (RoHS) in Electrical and Electronic Equipment (EEE) Directive.
LED BULBS TYPES BY SHAPE /BY CAP TYPE
An LED lightbulb is made up of a bulb and a cap. Some people call the cap the base – the terms are interchangeable and also sometimes referred to as the “fitting”. Led bulbs are available in the most common light fittings including B22, E27, GU10, MR16 etc. We stock LEDs in a wide range of types including standard bulbs, candles, golf balls, reflectors, spotlights and globes. LED bulbs are retrofit and are expected to work with existing light fittings and can be used as direct replacement. They reach full brightness instantaneously. Each of the different shapes provides a slightly different spread and angle of light, from 270 degree spread of a globe or golf bulb, to the narrow beam of a spotlight. The 'right' shape of the bulb and spread of the light is essentially down to your personal preference, but do consider how the bulbs will look when they are switched off as well as on and whether they will fit sensibly in their chosen location. For example, you wouldn't want a large stick shape if it will protrude from the top of your bedside lamp. See the graphic to below for the most common shape Led bulbs are now available in the most common fittings, including: GU10, MR16, B22, E27, E14 etc.
The IP (Ingress Protection) rating refers to the international measure of the degree of protection provided against the intrusion of solid objects (including body parts like hands and fingers), dust, accidental contact, and water in electrical enclosures. This specification you can find on led panels, downlights etc. The classification system utilises the letters IP followed by two or three digits. The first digit of the IP rating represents protection against penetration by solid objects accessing hazardous parts. The second digit indicates the degree of protection of the equipment inside the enclosure against moisture. An X in place of either digit means that either the enclosure has not been tested or that the test is not applicable.
Ingress of solid objects
Ingress of liquids
|0||No protection||No protection|
|1||Protected against solid objects over 50mm e.g. hands, large tools.||Protected against vertically falling drops of water or condensation.|
|2||Protected against solid objects over 12.5mm e.g. hands, large tools.||Protected against falling drops of water, if the case is disposed up to 15 from vertical.|
|3||Protected against solid objects over 2.5mm e.g. wire, small tools.||Protected against sprays of water from any direction, even if the case is disposed up to 60from vertical.|
|4||Protected against solid objects over 1.0mm e.g. wires.||Protected against splash water from any direction.|
|5||Limited protection against dust ingress.
(no harmful deposit)
|Protected against low pressure water jets from any direction. Limited ingress permitted.|
|6||Totally protected against dust ingress.||Protected against high pressure water jets from any direction. Limited ingress permitted.|
|7||N/A||Protected against short periods of immersion in water.|
|8||N/A||Protected against long, durable periods of immersion in water.|
|9k||N/A||Protected against close-range high pressure, high temperature spray downs.|