Lighting

task(s) to be performed

work space, layout, and colours - avoid glare or reflections on work surfaces

size of work area

sources of light in the room - consider levels of luminance in different areas of the room. The relative light level should be in the ratio 5:3:1 for work area, peripheral work area and immediate surroundings respectively. It is important to note that differences in luminance should not be excessive and that the light should decline gradually outwards from the work area. When working on a computer, the light from the monitor should be 3 to 4 times greater than the light in the rest of the room. Some students find a 3-sided shield, which fits around the computer monitor, cuts down on glare on the screen.

visual ability, age of user, and preferences for type of light eg daylight globes, warm white fluorescent tubes

ensure that lighting levels are suitable by installing an appropriate number of light fittings, using suitable wattage globes, and installing dimmer switches as appropriate. Stairs and landings may pose additional problems - stair lighting can be installed so that it can be switched on and off at the top and bottom of stairs.

it may take time for eyes to adapt when moving from bright to dark places - try to keep the levels of lighting the same throughout the home and school

when performing near vision tasks like reading, hobbies etc, higher levels of illumination may be required. A second light source which can shine directly on to the work may assist. To reduce glare and reflection, a lamp should be adjustable and allow the light to fall directly on to the task from over the shoulder or between the person and the task. Ensure that the lamp does not get too hot.

filament - are commonly used and are available in clear, frosted, white or coloured styles. They get hot and use more electricity than some other options.

blue - give off a white light that is called “daylight”

fluorescent - are more expensive to purchase but cheaper to run. They do not get hot and last up to eight times longer than filament globes. They give off up to five times the amount of light of filament globes with the same wattage.

halogen - are very expensive to buy and run. They are give off a very bright light and get very hot.