国标核心要求

GB/T 36876-2019《中小学校普通教室照明设计安装卫生要求》五大核心指标：

• 桌面照度≥300lx，黑板面照度≥500lx
• UGR眩光值≤19
• 显色指数Ra≥80
• 频闪：波动深度≤5%（无可视频闪）
• 蓝光：RG0豁免级（无蓝光危害）

一、照度标准详解

国标要求教室桌面维持平均照度≥300lx，照度均匀度U0≥0.7。黑板面照度≥500lx，均匀度U0≥0.8。实际改造中建议桌面照度达到400-500lx，确保后排角落也达标。

二、UGR眩光控制

UGR≤19意味着学生正常坐姿时不应感到灯具刺眼。实现方法：

• 选用防眩格栅灯或面板灯，遮光角≥30°
• 灯具长轴平行于学生视线方向布置
• 灯具距黑板水平距离≥1.5米

三、显色指数

Ra≥80是国标下限。高显色指数能让学生更准确地辨别颜色，美术教室建议Ra≥90。

四、频闪与蓝光

频闪会导致视疲劳和头痛。LED灯具频闪主要来自驱动电源，优质驱动频闪深度可≤1%。蓝光危害分RG0-RG3四级，教室必须使用RG0豁免级产品。

五、改造验收流程

1. 施工前检测：记录旧灯具照度、频闪、色温数据
2. 方案设计：根据教室尺寸计算灯具数量和布置
3. 产品选型：选择通过CQC认证的教室专用灯具
4. 安装施工：灯具平行于黑板，距黑板1.5-2米
5. 验收检测：使用照度计在桌面和黑板面多点测量

FAQ

Q：教室照明改造一间教室多少钱？
A：标准教室（60-70㎡）约需6-9盏面板灯+2盏黑板灯，材料费约3000-6000元。

Q：护眼灯和普通LED灯区别大吗？
A：护眼灯主要区别在频闪控制（≤5%）、显色指数（≥80）和蓝光等级（RG0），普通LED不一定达标。

Core National Standard Requirements

GB/T 36876-2019 "Hygienic Requirements for Lighting Design and Installation of Ordinary Classrooms in Primary and Secondary Schools" — five core indicators:

• Desktop illuminance ≥300lx, blackboard illuminance ≥500lx
• UGR glare value ≤19
• Color rendering index Ra≥80
• Flicker: fluctuation depth ≤5% (no visible flicker)
• Blue light: RG0 exempt level (no blue light hazard)

1. Illuminance Standards

The standard requires desktop maintained average illuminance ≥300lx, uniformity U0≥0.7. Blackboard illuminance ≥500lx, uniformity U0≥0.8. In practice, 400-500lx is recommended to ensure back corners meet standards.

2. UGR Glare Control

UGR≤19 means students in normal seating positions should not feel glare from fixtures. Implementation:

• Use anti-glare grille or panel lights, shielding angle ≥30°
• Fixtures' long axis parallel to students' line of sight
• Fixture distance from blackboard ≥1.5m

3. Color Rendering Index

Ra≥80 is the minimum standard. Higher CRI helps students distinguish colors accurately. Art classrooms should use Ra≥90.

4. Flicker and Blue Light

Flicker causes eye fatigue and headaches. LED flicker mainly comes from drivers — quality drivers can achieve ≤1% flicker depth. Blue light hazard is classified RG0-RG3; classrooms must use RG0 exempt products.

5. Retrofit Acceptance Process

1. Pre-construction testing: Record old fixture illuminance, flicker, color temperature
2. Design: Calculate fixture quantity and layout based on classroom dimensions
3. Product selection: Choose CQC-certified classroom fixtures
4. Installation: Fixtures parallel to blackboard, 1.5-2m from blackboard
5. Acceptance testing: Multi-point measurement on desktop and blackboard surfaces

FAQ

Q: How much does classroom lighting retrofit cost?
A: Standard classroom (60-70㎡) needs 6-9 panel lights + 2 blackboard lights, materials ~3,000-6,000 RMB.

Q: Is there a big difference between eye-care lights and regular LEDs?
A: Eye-care lights differ in flicker control (≤5%), CRI (≥80), and blue light level (RG0). Regular LEDs may not meet these standards.