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Luminous Intensity

A Planes
A planes are placed around the rotational axis passing through the luminaire and perpendicular to the luminaire axis. Luminous intensity distribution curves are given by luminous intensity vectors which make angles with the vertical axis in these planes

B Planes
The luminaire axis is also considered as the rotational axis. Luminous intensity distribution curves are the geometric locus of the end points of luminous intensities which make angles with the vertical axis in this plane.

C Planes
Luminous intensity distribution curves in C planes, where the vertical axis passing through the luminaire is taken as the rotational axis, are given with luminous intensity vectors which make angles with the vertical axis in these planes.

In order to render an opinion to the users, luminous intensity distribution curves of interior lighting luminaires are given at least for the planes of C0 o -180 o and C90o-270o. For road lighting luminaires, the curves should be given in minimum for C0o-180o C90o-270o and Imax planes in which the maximum luminous intensity is obtained. Luminous intensity distribution curves for projectors can be given in B or C planes.

Interior lighting luminaires
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Road lighting luminaires
Road lighting luminaires are divided into 3 groups according to CIE; The classification of luminaires according to CIE

* Maximum luminous intensity can be 1000 cd.

I80 : the maximum luminous intensity value for the angle of g = 80o with respect to the vertical axis in C=0o and C=20o planes (in terms of cd/1000 lm), I90 : the maximum luminous intensity value for the angle of g = 90o angle with respect to the vertical axis in C=0o and C=20o planes (in terms of cd/1000 lm), gmax.: The angular value at which the maximum luminous intensity (Imax) occurs.

IP Table
Luminaire protection classes are given as IPXY. Here, X (1st Number) shows protection against solid objects, Y (2nd Number) shows protection against liquids.

Reason for Protection Classification: Providing life safety during manwork by protecting the gear and the components from dust and water.