This page provides information on the Corona Light Material.
Overview
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The main purpose of the Corona Light Material is illuminating the scene. The typical use case is light-emitting objects which have different shapes than the ones available in the Corona Light object (e.g. light bulbs, custom-shaped lights, curved LED strips).
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Objects with the Corona Light Material applied, from the renderer’s point of view, do not differ from Corona Light objects - they are sampled the same way and have virtually the same properties.
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When setting up LightMix, the LightSelect render elements are created based on both the Corona Light Objects and the objects using the Corona Light Material.
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Objects using the Corona Light Material cannot be instanced. If there are many of them, and especially if they are hi-poly, this strongly affects RAM usage and rendering performance. The solution is to use the Corona Physical Material with self-illumination instead, because such materials can be instanced. At the same time, self-illumination comes with various limitations.