💡 筒灯计算器（数量、间距布局、流明法）Recessed Lighting Calculator (Number, Spacing Layout, Lumen Method)

使用说明与常见问题How-to & FAQ

「筒灯计算器（数量、间距布局、流明法）」是什么？What is the Recessed Lighting Calculator (Number, Spacing Layout, Lumen Method) tool?

三种方法估算筒灯：按每盏覆盖面积；按层高的经验间距（间距 ≈ 层高 ÷ 2，离墙为间距的一半）排出行列布局；或用流明法（所需照度 lux × 面积 ÷ 每盏流明 × 利用系数）。支持米和英尺。本地处理。Three ways to plan recessed lights: by coverage per light; by the ceiling-height spacing rule (spacing ≈ ceiling height ÷ 2, half a spacing from the walls) laid out in rows and columns; or by the lumen method (target lux × area ÷ lumens per light × utilisation factor). Metres or feet. Processed locally.

如何使用「筒灯计算器（数量、间距布局、流明法）」？How do I use the Recessed Lighting Calculator (Number, Spacing Layout, Lumen Method) tool?

在「筒灯计算器（数量、间距布局、流明法）」中，填写「方法」、「房间 m²」、「每盏覆盖 m²」、「单位」、「房间长」等参数，结果会随输入实时计算并显示在下方。In the Recessed Lighting Calculator (Number, Spacing Layout, Lumen Method): Fill in "Method", "Room m²", "Coverage / light m²", "Units", "Room length"; results are recalculated instantly as you type.

筒灯间距怎么定？How far apart should recessed lights be?

常用经验：间距约等于层高的一半，离墙约为间距的一半。例如 2.4 m 层高，间距约 1.2 m、离墙 0.6 m；8 ft 层高约 4 ft 间距。A common rule is spacing about half the ceiling height, with lights half a spacing from the walls. A 2.4 m ceiling gives about 1.2 m spacing and 0.6 m from the walls; an 8 ft ceiling about 4 ft.

流明法怎么算？How does the lumen method work?

灯数 = 目标照度 (lux) × 面积 (m²) ÷ (每盏流明 × 利用系数)。利用系数考虑灯具效率和墙面反射，普通房间约 0.5–0.7。Lights = target lux × area in m² ÷ (lumens per light × utilisation factor). The factor covers fitting efficiency and wall reflections, about 0.5–0.7 in a typical room.

不同房间需要多少照度？How much light do rooms need?

大致参考：走廊 100 lux、卧室 150 lux、客厅 200 lux、厨房和浴室 300 lux、书房或工作区 500 lux。具体可按喜好和灯具调整。Rough guide: hallway 100 lux, bedroom 150, living room 200, kitchen and bathroom 300, office or work area 500. Adjust for taste and the fittings.

能举个计算实例吗？Can you show a worked example?

例如在「筒灯计算器（数量、间距布局、流明法）」中填 方法 = 按覆盖面积，房间 m² = 20，每盏覆盖 m² = 4，结果区显示：建议盏数（向上）：5；计算：20 ÷ 4 = 5For example, entering Method = By coverage, Room m² = 20, Coverage / light m² = 4 in the Recessed Lighting Calculator (Number, Spacing Layout, Lumen Method) gives: Lights (ceil): 5; Calculation: 20 ÷ 4 = 5

哪些输入会被检查？Which inputs are validated?

「筒灯计算器（数量、间距布局、流明法）」会检查这些输入——「房间 m²」、「每盏覆盖 m²」、「房间长」、「房间宽」、「层高」、「每盏流明 lm」：所选方式用到时必须填写，须大于 0；「利用系数」：可留空；绝对值超过 10¹⁵ 的数也会被拒绝。不符合时结果区显示具体提示，不会给出数字。The Recessed Lighting Calculator (Number, Spacing Layout, Lumen Method) checks its inputs — "Room m²", "Coverage / light m²", "Room length", "Room width", "Ceiling height", "Lumens per light": required when the chosen option uses it, must be greater than 0; "Utilisation factor": optional; numbers above 10¹⁵ in absolute value are rejected too. When a value fails, the result area names the problem instead of showing a number.

有哪些选项可以调整？What options can I adjust?

「筒灯计算器（数量、间距布局、流明法）」的设置：「方法」可选 按覆盖面积、按层高间距布局、流明法（默认 按覆盖面积）；「房间 m²」默认 20；「每盏覆盖 m²」默认 4；「单位」可选 米、英尺（默认 米）；「房间长」默认 5；「房间宽」默认 4；「层高」默认 2.4；「用途（照度）」可选 走廊 100 lux、卧室 150 lux、客厅 200 lux、厨房 / 浴室 300 lux、书房 / 工作区 500 lux（默认 厨房 / 浴室 300 lux）；「每盏流明 lm」默认 800；「利用系数」默认 0.6。每次生成结果都按当前设置处理。Settings in the Recessed Lighting Calculator (Number, Spacing Layout, Lumen Method) — "Method": By coverage, Spacing layout, Lumen method (default By coverage); "Room m²" default 20; "Coverage / light m²" default 4; "Units": Metres, Feet (default Metres); "Room length" default 5; "Room width" default 4; "Ceiling height" default 2.4; "Room use (illuminance)": Hallway 100 lux, Bedroom 150 lux, Living room 200 lux, Kitchen or bathroom 300 lux, Office or work area 500 lux (default Kitchen or bathroom 300 lux); "Lumens…

手机上能用吗？Does it work on mobile?

可以。「筒灯计算器（数量、间距布局、流明法）」支持触屏操作，在手机和平板浏览器中均可使用，无需安装 App。Yes. The Recessed Lighting Calculator (Number, Spacing Layout, Lumen Method) supports touch input and works in mobile and tablet browsers without installing an app.

「筒灯计算器（数量、间距布局、流明法）」免费吗？需要注册吗？Is the Recessed Lighting Calculator (Number, Spacing Layout, Lumen Method) free? Do I need an account?

「筒灯计算器（数量、间距布局、流明法）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Recessed Lighting Calculator (Number, Spacing Layout, Lumen Method) is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.