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Decibels

Noise is measured in decibels (dB). A 3dB change is detectable but because of the scale used with decibels an increase of 3 means that the noise level has actually doubled.

There is some evidence to suggest that using coloured lighting may affect the ‘colour temperature’ of a room. Colours can be pleasing to some people and irritating for others so it is important not to be too assertive as to which are best. However, in general the warmer colours of sunset tend to be associated with deep sleep while the cooler colours of dawn are associated with darkness.