Product Overview
LD-4850 is a yellow phosphor specifically designed for low-power LED packaging, compatible with 470-473nm short-wave blue LED chips. This product features a 7.01μm fine particle size design with a 3500K color temperature, producing warm white light output.
LD-4850 features a wide FWHM of 125.7nm with broad spectrum coverage, suitable for low-power lighting and decorative lighting applications requiring warm white light effects with excellent visual comfort.
Core Advantages
🌡️ Warm White Light Output 3500K color temperature for warm, comfortable warm white effect. | 🌈 Ultra-Wide Spectrum 125.7nm FWHM for rich, soft light color with high visual comfort. |
🔵 Short-Wave Blue Compatibility Optimized for 470-473nm short-wave blue LED chips. | 📏 Fine Particle Size D50=7.01μm for low-power packaging with excellent dispensing. |
Not sure if this phosphor fits your application?Our engineers help 200+ companies find the right phosphor every month. Try our selection tool or talk to an expert. |
Key Performance Data
Yellow Emission Color | 572.5 nm Peak Wavelength |
125.7 nm FWHM (Ultra-wide) | 470–473 nm Compatible Chip Wavelength |
x = 0.4881, y = 0.5026 CIE 1931 Coordinates | 7.01 μm Particle Size (D50) |
3500 K Correlated Color Temperature | 85% Relative Brightness |
Technical Specifications
| Parameter | Specification | Notes |
|---|---|---|
| Product Model | LD-4850 | Low-power type |
| Emission Color | Yellow | — |
| CIE 1931 Coordinates | x = 0.4881, y = 0.5026 | — |
| Correlated Color Temperature (CCT) | 3500 K | Warm white |
| Dominant Wavelength | 576.9 nm | — |
| Peak Wavelength | 572.5 nm | Yellow region |
| FWHM | 125.7 nm | Ultra-wide spectrum |
| Relative Brightness | 85% | Stable brightness |
| Particle Size (D50) | 7.01 μm | Fine particle |
| Compatible Chip Wavelength | 470–473 nm | Short-wave blue light |
| Suitable Packaging Type | Straw hat / DIP | Low-power type |
| Shelf Life | 24 months | Sealed storage |
| *All parameters are based on standard laboratory test conditions. | ||
Performance Analysis
📊 Spectral Characteristics LD-4850 exhibits an ultra-broadband emission spectrum with a peak at 572.5nm (yellow region) and a FWHM of 125.7nm, achieving soft, rich warm white light effects. | 📉 Particle Size Distribution D50 is controlled at 7.01μm. The fine particle size is suitable for precision dispensing processes in low-power packaging. |
Recommended Applications
💡 Straw Hat Type LEDs Through-hole LED packages for warm white applications. | ✨ Warm White Decorative Lights Decorative lighting creating warm, comfortable atmosphere. |
🌙 Ambient & Night Lights Ambient lighting and night lights for relaxing environments. | 🔔 Indicator Lights Warm white indicator lights for various applications. |
🚀 READY TO GET STARTED? Test This Phosphor in Your ApplicationRequest a free sample to evaluate LD-4850 in your production environment, or contact our application engineers for technical support. 🚚 Ships in 3 business days ⏰ Reply within 24 hours 📜 COA included |
Why Choose LD-4850?
🔵 Short-Wave Blue Dedicated Best matching for 470-473nm chips with high excitation efficiency. | 🌡️ Comfortable Warm White 3500K color temperature creates warm lighting ambiance. |
🌈 Rich Light Color 125.7nm ultra-wide FWHM for high visual comfort and excellent color rendering. | |
Packaging & Storage
| Packaging | High-seal moisture-proof bottles suitable for long-term storage and transportation |
| Storage Conditions | Store sealed in a dry, cool environment. Avoid direct sunlight, high temperature, and high humidity. |
| Usage Recommendations | Use promptly after opening; reseal unused portions to minimize moisture exposure. |
| Shelf Life | 24 months under recommended sealed storage conditions |
Frequently Asked Questions (FAQ)
❓ Which chips is LD-4850 compatible with? LD-4850 is designed for 470-473nm short-wave blue LED chips. For 455-460nm chips, LD-4255 or YAG series is recommended. | ❓ What is the difference from LD-4850L? LD-4850 has a 7.01μm particle size (low-power packaging), while LD-4850L has a 9.6μm particle size (high-power packaging). Optical parameters are identical. |
❓ Can it be blended with other phosphors? Yes. LD-4850 can be blended with other phosphors for color temperature adjustment. | ❓ Do you offer small-batch samples? Yes. We can provide 50–100g evaluation samples for testing and verification. |
Samples & Technical Support
Get LD-4850 Technical Support and Samples TodayWe offer small-batch sample services for testing and validation. Contact our technical and sales team. |
