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Lighting design - initial design considerations

Before any optical design is carried out, the objective requirements for light distribution should be determined. This will depend on where the lamp is used, but there are two other factors in determining the objective requirements, namely the effective use of available luminous flux and the control of glare. The light distribution requirements for signal lamps are also determined by a third factor, which is visibility.

The first thing to consider is the following characteristics of the light source:
Luminous flux The first requirement for a light source is to be able to emit enough luminous flux.

Geometric dimensions The geometric dimensions of the light source will affect the size of the lamp used, so the size of the light source must be considered during design.

Brightness The brightness of any optical system will not exceed the brightness of the bulb (tube) (in the lamp), and even the best optical equipment will lose some.

Color The light color must be suitable for the lighting purpose of the lamp, which is another requirement for the light source. For specific purposes, such as street lights, the light color is not very important, but the light color of signal lights must be limited to a certain range.