
1 item, 1 package
Product Specifications
Ultra-thin lamp body with high luminous efficiency and high color rendering
Flicker-free, no video flicker
Uniform and soft light distribution with PMMA frosted cover
High color rendering index (CRI ≥ 85) for true color restoration
Highlight LED technology with enhanced radiator and convection cooling for durability

Hengliang UltraThin Model
CNÂ¥9.80

12W 4inch white light with a 125135mm cutout diameter
CNÂ¥12.80
Made of high-quality alloy material (Seiko aluminum)
Wide range of applications, durable and long-lasting
CRI ≥ 85 ensures high color fidelity and natural color presentation
Reduces visual fatigue with soft and even light emission
| Model | Size (Diameter*Height mm) | Lamp Body Color | Cut-out Size (mm) | Beam Angle | Material | Weight (g) | Power (W) | Light Source | Color Temperature (K) |
|---------------------|---------------------------|-----------------|-------------------|------------|----------|------------|-----------|--------------|-----------------------|
| QI3001-2-SDX-3W | 78*28 | Pure White | 55 | 110° | Alloy | 40 | 3 | SMD | 3000/4000/6000 |
| QI3001-2.5-SDX-5W | 98*25 | Pure White | 75 | 110° | Alloy | 55 | 5 | SMD | 3000/4000/6000 |
| QI3001-3.5-SDX-9W | 120*26 | Pure White | 95 | 110° | Alloy | 74 | 9 | SMD | 3000/4000/6000 |
| QI3001-4-SDF-12W | 146*27 | Pure White | 120 | 110° | Alloy | 123 | 12 | SMD | 3000/4000/6000 |
| QI3001-6-SDF-18W | 178*28 | Pure White | 150 | 110° | Alloy | 172 | 18 | SMD | 3000/4000/6000 |
| QI3001-8-SDF-24W | 218*33 | Pure White | 180 | 110° | Alloy | 230 | 24 | SMD | 3000/4000/6000 |
1. Use a suitable tool to cut a hole in the ceiling according to the lamp’s cut-out size.
2. Connect the lamp’s two power wires to the pre-installed wiring. It is recommended to have a professional electrician perform the installation.
3. Insert the lamp into the ceiling hole, ensuring the spring clips on both sides are vertical.
4. After confirming the lamp fits the cut-out, release the spring clips to secure the lamp in place.
5. Turn on the power to use the lamp.
Product Specifications
Brand: Biuyum
Series: QI Ultra-thin LED Downlight Series
Product Type: Ultra-thin LED Downlight
Key Features:
Ultra-thin lamp body with high luminous efficiency and high color rendering
Three selectable color temperatures: 3000K (warm and relaxing), 4000K (natural and comfortable), 6000K (bright and clear)
Flicker-free, no video flicker
Uniform and soft light distribution with PMMA frosted cover
High color rendering index (CRI ≥ 85) for true color restoration
Highlight LED technology with enhanced radiator and convection cooling for durability
Made of high-quality alloy material (Seiko aluminum)
Wide range of applications, durable and long-lasting
Color Rendering:
CRI ≥ 85 ensures high color fidelity and natural color presentation
Reduces visual fatigue with soft and even light emission
Product Parameters:
| Model | Size (Diameter*Height mm) | Lamp Body Color | Cut-out Size (mm) | Beam Angle | Material | Weight (g) | Power (W) | Light Source | Color Temperature (K) |
|---------------------|---------------------------|-----------------|-------------------|------------|----------|------------|-----------|--------------|-----------------------|
| QI3001-2-SDX-3W | 78*28 | Pure White | 55 | 110° | Alloy | 40 | 3 | SMD | 3000/4000/6000 |
| QI3001-2.5-SDX-5W | 98*25 | Pure White | 75 | 110° | Alloy | 55 | 5 | SMD | 3000/4000/6000 |
| QI3001-3.5-SDX-9W | 120*26 | Pure White | 95 | 110° | Alloy | 74 | 9 | SMD | 3000/4000/6000 |
| QI3001-4-SDF-12W | 146*27 | Pure White | 120 | 110° | Alloy | 123 | 12 | SMD | 3000/4000/6000 |
| QI3001-6-SDF-18W | 178*28 | Pure White | 150 | 110° | Alloy | 172 | 18 | SMD | 3000/4000/6000 |
| QI3001-8-SDF-24W | 218*33 | Pure White | 180 | 110° | Alloy | 230 | 24 | SMD | 3000/4000/6000 |
Electrical Specifications:
Voltage: 185-265V AC
Installation Instructions:
1. Use a suitable tool to cut a hole in the ceiling according to the lamp’s cut-out size.
2. Connect the lamp’s two power wires to the pre-installed wiring. It is recommended to have a professional electrician perform the installation.
3. Insert the lamp into the ceiling hole, ensuring the spring clips on both sides are vertical.
4. After confirming the lamp fits the cut-out, release the spring clips to secure the lamp in place.
5. Turn on the power to use the lamp.

300*300 18W white light
CNÂ¥29.70

Warm white light
CNÂ¥79.80