This high-power ultraviolet (UV) light module features a premium LG 5050 SMD LED chip pre-soldered onto a star-shaped 20mm aluminum metal-core printed circuit board (MCPCB). Emitting in the ultra-violet/visible border band of 400nm - 410nm, this 10W emitter sits at the very edge of the UVA spectrum and the absolute beginning of visible violet light. This specific band offers massive radiometric power and exceptional curing speed for industrial photopolymers, specialized 3D printing resins, and high-visibility glow activations.

Specifications

• LED Chip Brand: LG (High-efficiency semiconductor matrix)
• Form Factor / Package: 5050 SMD (5.0mm x 5.0 footprint)
• Mounting Substrate: 20mm Star Aluminum MCPCB (High-efficiency heat spreader)
• Peak Wavelength: 400nm - 410nm (UVA / Deep Violet boundary band)
• Maximum Power Dissipation: 10W
• Forward Voltage (VF): Typically 3.2V - 3.6V DC (Lower forward voltage equals better electrical efficiency)
• Maximum Forward Current (IF): Approx 700mA - 1000mA
• Viewing Angle: 120℃ - 140℃ wide uniform beam profile

Features

• High-Efficiency Boundary Chemistry: Because this chip operates at a longer wavelength (400nm - 410nm) than deeper UV LEDs, the semiconductor layers possess a lower forward voltage drop. This means it converts more electrical power into light and less into structural thermal waste compared to 365nm chips.
• Intense Visible Violet Output: Unlike shorter UV wavelengths that are invisible to human eyes, this band emits a highly visible, deep violet light. This serves as a built-in targeting guide, letting operators see exactly where the high-power curing energy is concentrated.
• Aluminum Star MCPCB Core: The underlying 20mm star board is stamped from high-purity aluminum. It serves as an immediate thermal bridge, spreading the intense heat generated by the microscopic silicon junction away from the chip toward your main cooling hardware.
• Pre-Tinned Solder Pads: Features large, clearly marked positive (+) and negative (-) contact terminals on the star edges. This lets you attach power leads quickly with a standard soldering iron without exposing the delicate 5050 SMD silicone lens to direct heat damage.

Understanding Wavelength Selection: 405nm vs. Shorter UV

Choosing a 400nm - 410nm (commonly averaged as 405nm) chip over deeper UV alternatives changes how it interacts with chemical photoinitiators:

• 400nm – 410nm (This Chip): The exact target wavelength used by the vast majority of desktop resin 3D printers (SLA/MSLA) and industrial UV adhesives. Photoinitiators inside modern polymers are intentionally tuned to react violently at 405nm, resulting in rapid cross-linking and ultra-fast curing times.
• 395nm: Ideal for general blacklight effects, fluorescent decorations, and automotive leak detection dye tracking.
• 365nm: Completely invisible to the naked eye; used for advanced forensics, laboratory mineral analysis, and verifying high-security features in currency or passports where visible light bleed would ruin image contrast.

Common Applications

• 3D Printing Post-Curing: Building high-power UV curing chambers to fully harden and finish resin prints fresh off MSLA/SLA 3D printers.
• Industrial UV Adhesives: Instantly bonding glass, acrylics, and structural polymers that utilize 405nm-activated optical glues.
• Fly Tying & Crafting resins: Rapidly curing thick layers of clear UV craft gels, enamel polishes, and fly-fishing lure coatings.
• Specialty Display & UV Art: Exciting deep-level fluorescence in select phosphors, reactive body paints, and industrial safety markers.

Critical Drivers & Safety Guidelines

• Constant Current Driver Required: CRITICAL: Do not connect this LED directly to a 12V battery, car circuit, or standard fixed-voltage power supply. High-power LEDs suffer from thermal runaway-as the chip warms up, its resistance drops, forcing it to draw more current until it burns itself out. You must power this module using a dedicated Constant Current LED Driver calibrated between 700mA and 1000mA.
• Active Heatsink Mandatory: A 10W LED concentrates immense heat into a tiny area. The 20mm aluminum star board is merely a heat spreader, not a standalone radiator. You must bolt or bond the star board down to a larger aluminum finned heatsink using high-quality thermal paste or thermal tape. Running this chip for more than 5 seconds without a heatsink will permanently degrade the chip brightness or instantly melt the internal wire bonds.
• Visual Safety Warning: Although this light sits on the visible boundary, it outputs high-energy radiation that can cause eye fatigue and retinal strain over time. Avoid staring directly into the beam of an active 10W LED. If you are using it for extended periods to inspect components or cure resins, wear UV400-rated or amber-tinted safety glasses to shield your eyes from reflective glare.