Keyword Analysis & Research: llmf light

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What is the lamp lumen maintenance factor (llmf)?

The amount of light from the light source at a specific time in the future is referred to as the lamp lumen maintenance factor, or LLMF. The lifetime of a LED module is defined as the time it takes until its light output, or lumen maintenance, reaches 70% of the initial output.

What is the difference between llmf and LSF?

Here, the factors LLMF and LSF describe the ratio of the light source to the maintenance factor in analogy to the lamp maintenance factor (LaMF, see section ) of discharge lamps. The lamp lumen maintenance factor LLMF considers the average decrease in luminous flux of the LED light source.

What is the normal value of llmf for a room?

Depends on reflectance factors in the room, how clean is the environment and finally the cleaning interval of the room. Normal values for interior use are between 0,95–0,97 for clean environments. LLMF is basically the same as the L-value. L80 corresponds to a LLMF of 0,8.

What is the L-value and llmf for Glamox?

Normal values for interior use are between 0,95–0,97 for clean environments. LLMF is basically the same as the L-value. L80 corresponds to a LLMF of 0,8. In order to find the correct L value you must first define the correct required lifetime and the correct required ambient temperature (T a ). Glamox states the L-value after 50000 h at T a 25 deg.


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