LED Lighting

LED Lighting - White

Part Number	Description / PDF	Quantity
SPMWH1228FD5WAV0SA Samsung Semiconductor	LED LM281B+ WARM WHT 3000K SMD	0
SCP8TTF1HEL1TKN34E Samsung Semiconductor	LED LH181B 4000K 80CRI SMD	0
SPMWH1228FD7WAVKS4 Samsung Semiconductor	LED LM281B WARM WHT 3000K 2SMD	0
SPMWHT327FD5GBWMS3 Samsung Semiconductor	LED WHITE 2700K 80CRI SMD	5117
SPMWHT541MP5WAT0S5 Samsung Semiconductor	LED 4000K 80CRI SMD	36
SPHWH2L3D30CD4TPJ3 Samsung Semiconductor	LED LH351B NEU WHITE 4000K 2SMD	3627
SPMWHT541MD5WAVHS3 Samsung Semiconductor	LED WARM WHITE 3000K 80CRI 4SMD	0
SPMWH1229AD7SGTMSA Samsung Semiconductor	LED 4000K 90CRI SMD	6300
SPMWH1221FD7GBUMSA Samsung Semiconductor	LED 3500K 90CRI SMD	39999
SPMWH1228FD5WAVKSE Samsung Semiconductor	LED LM281B+ WARM WHT 3000K SMD	0
SPMWH1228FD5WAP0S4 Samsung Semiconductor	LED 6500K 80CRI SMD	0
SCP8VTF1HEL1VUM34E Samsung Semiconductor	LED LH181B 3000K 80CRI SMD	0
SPMWHT541MD5WATMSC Samsung Semiconductor	LED NEUTRAL WHT 4000K 80CRI 4SMD	0
SCP8UTF1HEL1UKN34E Samsung Semiconductor	LED LH181B 3500K 80CRI SMD	0
SPMWH3326MP7WAR0S0 Samsung Semiconductor	LED WHITE 5000K 90CRI 3030	0
SPHWH2L3D30ED4RTM3 Samsung Semiconductor	LED LH351B COOL WHITE 5000K SMD	3650
SPMWH1228MD5WAQUVK Samsung Semiconductor	LED	39280
SPMWH1228FD5WAVMSC Samsung Semiconductor	LED LM281B+ WARM WHT 3000K SMD	0
SPHWH2L3D30DD4RTM3 Samsung Semiconductor	LED LH351B COOL WHITE 5000K 2SMD	0
SPMWH1228FD5WAWUS2 Samsung Semiconductor	LED LM281B WARM WHT 2700K 2SMD	0

LED Lighting - White

1. Overview

White Light-Emitting Diodes (LEDs) are semiconductor devices that convert electrical energy into visible white light. They represent a fundamental shift from traditional lighting technologies due to their energy efficiency, longevity, and controllability. Modern white LEDs primarily use blue-emitting chips coated with phosphor materials to produce broad-spectrum white light, enabling precise color tuning and dimming capabilities.

2. Major Types & Functional Classification

Type	Functional Features	Application Examples
Blue Chip + Yellow Phosphor	Cost-effective, CRI 70-90, correlated color temperature (CCT) 2700-6500K	General lighting, residential bulbs
RGB Tri-color	Tunable color output, high CRI (>90), complex driver requirements	Stage lighting, architectural accenting
UV Chip + RGB Phosphor	Enhanced color rendering, reduced blue light hazard	Museum lighting, medical diagnostics
Remote Phosphor	Uniform light distribution, improved thermal management	Commercial downlights, automotive headlamps

3. Structure & Components

Typical white LED construction includes:

Die: Gallium Nitride (GaN) on sapphire substrate emitting blue light (450nm)
Phosphor Layer: Cerium-doped YAG (Y₃Al₅O₁₂) converting blue to yellow wavelengths
Encapsulation: Silicon dioxide lens with secondary optical elements
Thermal Interface: Metal-core PCB (MCPCB) for heat dissipation
Driver Circuit: Constant current source with EMI filtering

4. Key Technical Parameters

Parameter	Typical Range	Importance
Luminous Flux	100-20,000 lm	Determines light output capability
Color Temperature	2700K-6500K	Affects ambiance and visual comfort
Color Rendering Index (CRI)	70-98	Measures color fidelity accuracy
Luminous Efficacy	100-200 lm/W	Energy conversion efficiency metric
Lifespan	25,000-100,000 hrs	Total cost of ownership factor
Forward Voltage	2.8-3.6 V	Driver design specification

5. Application Fields

Residential: Smart bulbs, under-cabinet lighting
Commercial: Retail accent lighting, office panel lights
Industrial: High-bay warehouse fixtures, machine vision systems
Transportation: Automotive headlights, aircraft cabin lighting
Healthcare: Surgical lighting, circadian rhythm regulation

6. Leading Manufacturers & Products

Manufacturer	Key Product Series	Technical Highlights
Signify (Philips)	Luxeon 3535L	180 lm/W efficacy, 90 CRI, automotive grade
OSRAM Opto	Ostar Lighting	Surface-mount package, 2000cd/m luminance
Cree (Wolfspeed)	XHP50.2	High-density emitter, 20A drive current capability
Seoul Semiconductor	WICOP2	Chip-level integration, 0.2W-100W scalability

7. Selection Recommendations

Key considerations:

Optical requirements: Match CRI and CCT to application needs
Thermal management: Select appropriate heatsink and package type
Electrical compatibility: Verify driver specifications and dimming protocols
Form factor: Consider footprint constraints (e.g., 2835, 5630 packages)
Regulatory compliance: Ensure ENERGY STAR, DLC, or UL certification

8. Industry Trends

Emerging developments include:

Micro-LED integration for displays and Li-Fi communication
Quantum dot phosphors expanding color gamut (NTSC >100%)
Smart lighting systems with IoT connectivity (Zigbee, Bluetooth Mesh)
Advanced thermal materials (graphene MCPCBs)
Regulatory shifts toward higher minimum efficacy standards (DOE 2023: 120 lm/W)