Lighting. Monday , September 24th , 2018 - 20:43:08 PM
Cove light: Such light is mounted at the perimeter of the living space, such as where the ceiling and walls meet. A large crown molding may be used to hide the actual light. Light fixtures are typically placed about 4 inches from the wall in order to minimize any scalloping effects. It is also recommended that the ceiling height above the light fixture be no more than twice the distance of the fixture to the wall (e.g., a bulb placed 3 inches away from the wall should be no more than 6 inches away from the ceiling).
Light quality and colour can dramatically change the appearance of a room so it is important to get this right. You wouldn't, for example, want bright white lighting in a bedroom, instead a soft warm white ambiance would be more suitable. When choosing a light bulb you first need to decide which colour temperature you require. Colour temperature is a measure of how warm or cool a colour appears. It is measured in Kelvin; the standard measurement for lighting output in addition to lumen output. Colour temperature is derived from the colour of light produced when carbon is heated. The Kelvin Scale ranges from extra warm white at 2,700k giving a warm yellow glow, to white at 3,500k, cool white at 4,000k and daylight colour at 6,500k which produces a white blue colour. LED, CFL and halogen energy savers are all available in a range of colour. Complaints have been made in the past about LED giving off a cool blue light but with the improvement in technology, as long as you buy a good quality LED this should not be a problem. It is then important to look at the colour rendering index (CRI) which shows to what extent the light will make an object appear its true colour. An incandescent bulb is rated at 100% because its light contains a full spectrum of colour. CFLs do not contain the full colour spectrum but a good quality triphosphor fluorescent rated between 80-90% will be sufficient for everyday use. Higher rated CFLs can be obtained but are usually only used by designers or artists and are less efficient. It is advisable not to buy a light bulb which scores below 80% on the CRI scale. Energy saving light bulbs have received a bad press at times because of the light they produce, but this has tended to be because many poor grade CFLs either brought from supermarkets or given out for free by energy companies have come onto the market.
Industries and factories are usually of huge size and work 24x7 to manufacture their product. These places require brighter light to work efficiently and in need to reduce energy consumption. Thus, LED is the smart move for them. Switching to LED light has reduced their energy cost without compromising with light quality.
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