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General room illumination with 500 lx and illumination of the working area with 1000 lx are best achieved with a larger number of fluorescent lamps on the ceiling above and in front of the dental chair.

Daylight white lamps with good colour rendering (e.g. Osram colour 19 or Philips colour 47) are a good combination with changing daylight and the colour of light of the operating light. The colour of external skin, mucous membrane and teeth appears natural. The eight dental surgical lights examined differ in quality. The maximum illuminance is between 9000 and 21 000 lx and is thus sufficiently high. The evenness of light distribution within an ellipse 9 cm and 18 cm in diameter is between 1 : 4 and 1 : 15.

Illuminance can be adjusted to the work in hand by means of controls. If the patient looks into the operating lights, maximum luminances of 5 cd/cm2-20 cd/cm2 occur 8 cm above the illuminance maximum in six operating lights. Luminances of more than 20 cd/cm2 cause squinting and running eyes. A light fitting with more than 200 cd/cm2 should not be used.

And one of  this kind of light is the dental shadowless lamps which is often used in dental treatment.

A sharp fall in illuminance (distinct light/dark threshold) and low luminances to the patient's eyes can be achieved with very directed light. Very directed light leads to very heavy shadows. Similarly, less specifically directed light leads to softer shadows so that objects in the oral cavity can be discerned easily, but the patient is no longer dazzled.

The colour temperature, heat radiation, easy handling, stability and price are also important for qualitative assessment.

If you would like to purchase other types of dental lights, such as wall mounted dental lamp and dental ceiling mounted lights, please click on the text link.

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