The **HLMP-EH08-R2000** is a high-performance, precision optical performance AlInGaP (Aluminum Indium Gallium Phosphide) LED lamp. These LEDs are specifically designed for applications requiring high light output and reliability in outdoor environments. --- ## 1. Technical Specifications The following table summarizes the key electrical and optical characteristics: | Parameter | Specification | | :--- | :--- | | **Material** | AlInGaP (Aluminum Indium Gallium Phosphide) | | **Color** | Red-Orange | | **Dominant Wavelength** | 615 nm | | **Luminous Intensity** | 1150 - 2900 mcd (at 20mA) | | **Viewing Angle** | 8 Degrees (Narrow Beam) | | **Forward Voltage ($V_F$)** | 1.8V to 2.4V (Typical 2.1V) | | **Maximum Peak Forward Current** | 100 mA | | **Package Type** | T-1 3/4 (5mm) Round Through-Hole | --- ## 2. Key Electronic Features ### A. Material Composition (AlInGaP) The use of **AlInGaP II** technology allows the LED to provide higher luminous efficiency compared to older technologies. It provides consistent light output over a wide range of temperatures and is highly resistant to degradation. ### B. Optical Precision * **Narrow Radiation Pattern:** With an 8-degree viewing angle, this LED acts as a "spotlight." This is achieved through a precision-molded clear epoxy lens. * **Color Stability:** The Red-Orange wavelength is optimized for visibility in daylight and high-contrast environments. ### C. Environmental Durability * **Temperature Range:** Operates between -40°C to +100°C. * **Moisture Resistance:** The epoxy contains UV inhibitors to prevent yellowing or cracking when exposed to direct sunlight over long periods. --- ## 3. Circuit Application Example To drive this LED using a 5V DC source, you must use a current-limiting resistor to prevent thermal runaway. ```python # Simple Ohm's Law Calculation for Resistor (R) # R = (Source_Voltage - Forward_Voltage) / Target_Current source_v = 5.0 forward_v = 2.1 target_i = 0.020 # 20mA resistor = (5.0 - 2.1) / 0.020 print(f"Required Resistor: {resistor} Ohms") # Result: 145 Ohms ``` --- ## 4. Typical Applications 1. **Variable Message Signs (VMS):** Highway and traffic information boards. 2. **Solar Powered Signs:** Due to its high efficiency/low power consumption. 3. **Commercial Outdoor Advertising:** Large-scale LED billboards. 4. **Traffic Signals:** Stoplights and pedestrian crossing indicators.