Maintenance Factor For Outdoor Lighting

Llmf lamp lumen maintenance factor based on manufacturer s chip lm80 data and tm21 calculator for operation in a 25 c ambient temperature for the nominated application service life.

Maintenance factor for outdoor lighting.

The society of light lighting s code for lighting states that. Maintenance factors are an important consideration in the planning of lighting installations. Maintenance factor occurred by the aging or pollution of the lamp. Lamp lumen maintenance factor llmf describes the decrease in lamp luminous flux of the light sources over the duration of use.

The lighting scheme should be designed with an overall maintenance factor calculated for the selected lighting equipment environment and specified maintenance schedule 2. With this you can determine how well lit an area will be over time. To set the maintenance method and maintenance factors for the lighting installation four steps are necessary. Selection of the maintenance method of a simplified or detailed maintenance factor in accordance with cie 97 2005 for indoor or outdoor areas embedded areas and open terrain.

It is the multiplier that expresses the decrease in light output. The society of light lighting s code for lighting states that. With the advent of led lighting maintenance factors have increased significantly over fluorescent and hid counterparts they were designed to replace. Positioning of the lighting in the selected area 3.

Lmf luminaire maintenance factor taken from table b1 of as nzs 1680 4 2001 according to the luminaires ip rating luminaire type and nominated cleaning. The reduction in luminous flux llmf and total failure lsf of led luminaires are shown. Maintenance factor refers to the loss of light that occurs over time and is also known as loss factor. Lighting maintenance factor is a number that describes the reduction of lumens or light levels over time.

Maintenance factors are an important consideration in the planning of lighting installations. The maintenance factor according to önorm en 12464 1 indicates how quickly the light intensity in a system decreases. For indoor lighting a room maintenance factor and for outdoor lighting a surface maintenance factor if necessary must also be considered. The calculation of the maintenance factor is documented and together with a maintenance plan handed over to the operator of the lighting.

In addition a luminaire maintenance factor due to soiling is to be considered. Theoretically the mf is composed of. The maintenance factor mf depends on the type of light source and luminaire the dust and soiling of the room as well as the maintenance method and the maintenance interval.