OptionalcolorInitial color, copied into the light's own array as linear-light RGB.
A CSS string is parsed as sRGB and decoded first (§60a). Defaults to
white [1, 1, 1], §68's own example value.
OptionalinnerInitial SpotLight.innerConeAngle, in radians (§7a). Defaults to
0 — glTF KHR_lights_punctual's default, i.e. a cone that fades from
its axis outward with no fully-lit core.
OptionalintensityInitial PunctualLight.intensity. Defaults to 1 — the
multiplicative identity, exactly as DirectionalLightOptions
defaults it.
OptionalouterInitial SpotLight.outerConeAngle, in radians (§7a). Defaults to
Math.PI / 4, glTF's default: a 90° cone.
OptionalrangeInitial PunctualLight.range, in metres (§40). Defaults to 0,
which means unbounded.
Construction arguments of SpotLight (§68).