Learn about SMD LED lamp beads
In modern lighting and display technology, SMD LED lamp beads are widely used in various electronic products, lighting equipment and display screens due to their small size, high brightness, energy saving and environmental protection.
| Model | Size(mm) | watt | Light Effect | Ra | Heat dissipation | Typical scenarios |
|---|---|---|---|---|---|---|
| 0402 (1005) | 1.0×0.5 | 0.06W | — | — | Plastic packaging | Micro Device Indicator |
| 2835 | 2.8×3.5 | 0.1~0.5W | 100-150lm/W | ≥80 | Copper silver plated bracket | Home/commercial lighting |
| 5730 | 5.7×3.0 | 0.3~0.5W | 100lm/W | ≥80 | Copper bracket + thermal separation | Industrial/Outdoor Lighting |
| 3535 | 3.5×3.5 | 0.5~3W | 120-200lm/W | ≥90 | Ceramic Substrate | Car lights/stage lights |
| 3030 | 3.0×3.0 | 0.2~1W | 120-130lm/W | 70-98 | Ceramic Substrate | Street lights/ downlights / car lights |
| 5050 | 5.0×5.0 | 0.18W-0.24W | 60-90lm/W | ≥80 | Ceramic Substrate | Home lighting/Car lights |
Advantages
High integration: Chip packaging (such as 2835, 5730) supports SMT process and is suitable for automated mass production.
Energy saving: The luminous efficiency of white light 2835 reaches 150lm/W, which saves more than 70% energy compared with traditional light sources.
Long life: Ceramic substrate lamp beads (such as 3535) have thermal resistance ≤5℃/W and a lifespan of over 50,000 hours.
limitation
Heat dissipation bottleneck: High-power lamp beads (such as 3W 3535) require additional heat dissipation design, otherwise the light decay will be accelerated.
Cost difference: High color rendering (Ra ≥ 90) models are 30% – 50% more expensive than ordinary lamp beads.
Model Selection
Home lighting: 2835 (0.2W-0.5W) is the first choice, which balances light efficiency and cost, and is suitable for ceiling lamps and downlights.
Industrial lighting: 5730 (0.5W) or 3535 (1W-3W), meeting the requirements of high brightness and weather resistance.
Automotive lighting: Ceramic-based 3535 (red/blue light), temperature resistant -40°C~85°C, suitable for instrument backlight and ambient light