: Why LED lamps consists of many small LED or grids of LED why can’t we make just one big LED light source?
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A LED is a point source of light.
You increase the light output and use a lens (which is done), but you can only go so far as you will have trouble managing the heat generated which will also be concentrated in that point.
These lights exists, but often require cooling with a water circuit.
Using multiple light sources over a larger area helps with managing/spreading the heat and might also negate the need for using a lens.
So, it can be done, but it is not always the most suitable solution.
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