Lighting Design Uniformity Ratio

The current standard is easy to design for and to verify promoting systems that provide good uniformity rather than ones that use a few large output luminaires.

Lighting design uniformity ratio. To achieve acceptable uniformity the luminaire spacing to mounting height ratio from vendors data catalogs should not be exceeded. You and your client have chosen the style of fixture that meets your aesthetic design. The closer to one it is the more uniformly lit the space is.

The light uniformity factor refers to the lights intensity in a given area. E AVG 05 fc. Refer to DIRECTIVE 397.

Around Public Facilities ie. Ences in brightness so that uniformity should not fall below U O E minĒ. The uniformity ratio should be no more than 31.

The closer the illuminance uniformity is to 1 the better otherwise the smaller the more visual fatigue. Finally the luminaires must be spaced in the room such that acceptable uniformity is achieved. The luminous efficiency is the ratio of the luminous flux to the electrical power consumed lmW.

The luminous efficiency is the ratio of the luminous flux to the electrical power consumed lmW. Please see IES RP-6-88 for various recommendations on acceptable limits of CV. Uniform lighting allows us to perceive the environment continuously and without sudden breaks caused by lighting level drops.

The ration of minimal illumination is usually mentioned when talking about light uniformity. The uniformity ratio should be no more than 41. CV is defined as the ratio of the standard deviation of all values to the mean average value.