Product Overview
LD-4949 is a high-brightness white LED phosphor specifically designed for warm white to natural white LED lighting applications. This product can efficiently match 473-475nm blue LED chips, achieving uniform, soft white light output through stable broadband emission spectrum.
LD-4949 can be used alone to obtain approximately 3000K white light, or blended with other LD series phosphors to flexibly adjust correlated color temperature (CCT) and color rendering index (CRI), suitable for various packaging formats and lighting scenarios.
Core Advantages
🎯 Efficient Short-Wave Blue Matching Optimized for 473-475nm blue LED chips with high excitation efficiency. | ⚙️ Multi-Packaging Compatible 7.01μm particle size compatible with SMD and DIP packaging processes. |
🌈 Broadband Emission 127.5nm FWHM with continuous, rich spectrum improving white light uniformity. | 🎨 Flexible Formulation Supports standalone use or blending with LD series for customized CCT and CRI. |
Not sure if this phosphor fits your application?Our engineers help 200+ companies find the right phosphor every month. |
Key Performance Data
Yellow Emission Color | 573.3 nm Peak Wavelength |
127.5 nm FWHM (Broad) | 473–475 nm Compatible Chip |
x = 0.4942, y = 0.4973 CIE 1931 Coordinates | 7.01 μm Particle Size (D50) |
3000 K Color Temperature | 84% Relative Brightness |
Technical Specifications
| Parameter | Specification | Notes |
|---|---|---|
| Product Model | LD-4949 (HB-4949) | — |
| Emission Color | Yellow | — |
| CIE 1931 Coordinates | x = 0.4942, y = 0.4973 | White light region |
| CCT | 3000 K | Warm white |
| Dominant Wavelength | 577.8 nm | — |
| Peak Wavelength | 573.3 nm | — |
| FWHM | 127.5 nm | Broad spectrum |
| Relative Brightness | 84% | High brightness |
| Particle Size (D50) | 7.01 μm | — |
| Compatible Chip | 473–475 nm | Short-wave blue |
| Packaging Type | Straw hat / DIP / SMD | Full compatibility |
| *All parameters based on standard lab conditions. | ||
Performance Analysis
📊 Spectral Characteristics Typical broadband emission spectrum with peak at 573.3nm, smoothly extending toward red. This continuous wide spectrum structure is the foundation for 3000K white light. | 📉 Particle Size Distribution Concentrated, uniform distribution. Stable 7.01μm particle size helps maintain consistent settling speed during dispensing. |
Recommended Applications
💡 General Lighting Indoor fixtures, ceiling lights, bulbs for residential and commercial use. | 📺 Display & Backlighting LED displays and backlight modules requiring warm white illumination. |
🚗 Automotive Lighting Interior lighting and instrument backlighting for vehicles. | 📦 Professional Lighting Projection equipment, flashlights, and signal indicators. |
🚀 READY TO GET STARTED? Test This Phosphor in Your ApplicationRequest a free sample or contact our engineers for support. 🚚 Ships in 3 days ⏰ 24h reply 📜 COA included |
Why Choose LD-4949?
🔵 Short-Wave Blue Dedicated Optimized for 473-475nm chips with higher excitation efficiency. | ⚙️ Multi-Packaging Compatible 7.01μm compatible with SMD and traditional through-hole packaging. |
🌈 Stable Broad Spectrum Natural, soft light color suitable for high visual comfort lighting applications. | |
Packaging & Storage
| Packaging | High-seal moisture-proof bottles |
| Storage | Sealed, dry, cool environment |
| Shelf Life | 24 months sealed |
FAQ
❓ Which chips is LD-4949 suitable for? Designed for 473-475nm blue LED chips with higher efficiency in this wavelength range. | ❓ Can it be used alone? Yes. LD-4949 alone produces approximately 3000K white light; blend with other LD series for adjustment. |
❓ What does 84% brightness represent? High brightness grade compared to standard reference sample under identical test conditions. | ❓ Sample availability? Yes, 50-100g samples available for testing. |
Samples & Technical Support
Get LD-4949 Support TodayContact our technical and sales team. |
