Docs: SpotLight.html

[l123wx]

The quantitative relationship between the power and intensity of spotlight is wrong

three.js/docs/api/zh/lights/SpotLight.html

Lines 108 to 119 in 16274d6

	<h3>[property:Float power]</h3>
	<p>
	光功率<br />
	在 [page:WebGLRenderer.physicallyCorrectLights physically correct] 模式中，
	表示以"流明（光通量单位）"为单位的光功率。 缺省值 - *4Math.PI*。 <br /><br />
	该值与 [page:.intensity intensity] 直接关联
	<code>
	power = intensity * 4&pi;
	</code>
	修改该值也会导致光强度的改变。
	</p>

three.js/src/lights/SpotLight.js

Lines 31 to 44 in 16274d6

	get power() {
	// compute the light's luminous power (in lumens) from its intensity (in candela)
	// by convention for a spotlight, luminous power (lm) = π * luminous intensity (cd)
	return this.intensity * Math.PI;
	}
	set power( power ) {
	// set the light's intensity (in candela) from the desired luminous power (in lumens)
	this.intensity = power / Math.PI;
	}

[Mugen87]

Closing this in favor of #26064.

The Chinese light pages are a bit outdated. Some new texts need to be translated again.