How to determine the right illumination intensity for your indicator?
Date: 10/09/2023
IS IT INSIDE OR OUTSIDE?
Natural light is a very intense light source even on a cloudy day but especially on a sunny day. The intensity must be a lot higher for the indicator to be seen and daylight viewable.
IS IT CLOSE BY OR FAR AWAY?
The intensity required to see and notice an indicator light close by and at a long distance is very different. The intensity needs to increase with distance.
WHAT AND HOW MANY COLORS?
Is it just a single color your application needs, or bi- or even tricolor, maybe an RGB? Furthermore, blue, and white colored light diffuses easier, whereas red is sharper.
THE SIZE OF THE LED
The same category of LED can look more intense or less intense depending on the size of the indicator. This is due to light diffusion and the area affected by the light.
In APEM’s indicator range we have categorized the intensities in three different groups: Standard intensity is good for indoor applications, plus it can be used for backlighting different symbols. It is important that you follow the recommended loads as LEDs are very sensitive to voltage changes. Use a resistor to adjust the voltage as if high voltage is put through the LED it could be damaged.
Super bright indicators are clear LEDs that are good for long distance viewing and daylight visible
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