ReadonlycolorStraight RGB in §60a's linear-light working space (§68).
ReadonlyintensityScalar multiplier on the colour: the irradiance, over π, at unit
distance (§68; see @fourjs/scene's light.ts for the convention).
ReadonlyisThe brand collectSceneLights recognises. A literal true, not a
method, so the check is one property load per node per frame.
ReadonlylightReadonlyrangeDistance at which the contribution reaches zero, or 0 for unbounded —
the KHR_lights_punctual window @fourjs/scene's PunctualLight documents.
A PunctualLightSourceBase with no axis — §68's point light.