Lighting Product Inspection | Reading and Writing Desk Lamp Inspection Standards and Methods

Appearance inspection

1. Dimension inspection : Use a general measuring tool with an accuracy of not less than 0.1mm to measure the external dimensions of the lamp.

2. Visual inspection :

   • The outer surface color should be consistent with the packaging instructions

   • The product structure should be consistent with the instructions and drawings

Marking requirements check

1. Table lamp body mark :

   • Product name and model

   • The suitable position or range of dimming/color-adjusting desk lamp for reading and writing tasks

   • Photometric level and standard document number

2. Instruction manual content check :

   • Manufacturer and model specifications of replaceable light sources

   • Correlated color temperature of fluorescent desk lamps

   • Correlated color temperature or adjustable range of LED desk lamps (if over 4000K, a warning for nighttime use is required)

   • Color rendering index (Ra and/or R9)

   • Rated input power and power factor

   • Description of normal working position (including light emitting surface height, tilt angle, etc.)

   • Installation requirements for clamp-on desk lamps

   • Rated working time of desk lamp with charging device

   • Fluctuation depth and transient optical artifact characteristics

   • Power cord length (if applicable)

Photometric performance test

Light blocking and anti-glare testing

1. Test Location:

   • The distance between the center of the luminance meter lens and the desktop is 400mm

   • 600mm horizontal distance from the geometric center of the light source cavity

   • Perpendicular to the edge of the table and passing through the geometric center of the light source cavity

2. Standard requirements:

   • When the light-emitting surface height is less than 750mm, the surface brightness of all components is ≤2000cd/m²

Illumination and illumination uniformity test

1. Test condition settings:

   • According to the normal working position indicated in the manual

   • If no instructions are given, test according to the position specified in the standard

2. Test area:

   • Total area: 700mm×500mm rectangle

   • Center area: 500mm×300mm rectangle

   • Grid spacing 100mm

3. Standard requirements:

   Light level	Minimum horizontal illuminance (lx)	Illumination uniformity
   	Central Area	Total area	Central Area	Total area
   AA	≥500	≥250	≤3	≤7
   A-level	≥300	≥150	≤3	≤7

   • The maximum horizontal illumination should not exceed 2500lx

Chromaticity performance test

1. Color rendering:

   • General color rendering index Ra≥80

   • LED desk lamp special color rendering index R9>0

2. Correlated color temperature and color tolerance:

   • Color tolerance SDCM≤5

Noise test

1. Test method:

   • Test under working state of desk lamp

   • Measurement location:

     • 100mm from the 45° oblique line in front of the center axis of the base

     • Or 100mm horizontal distance from the center of the front lower edge of the lampshade

     • Independent control device measured 100mm above

2. Standard requirements:

   • Noise ≤ 25dB(A)

Other considerations

1. The test should be carried out after the light source is stable

2. For height-adjustable desk lamps, the height test should be carried out according to the instructions or standards.

3. LED desk lamps with a color temperature exceeding 4000K should be checked for nighttime usage warnings.

4. Check that all test results are consistent with product claims

We provide professional third-party inspection and factory inspection services to ensure that the final tableware and kitchenware products delivered comply with standards, regulations and target market requirements, avoid disputes due to product quality issues, and improve supply chain management and quality control measures.