Ushio 1001004 (JDR/M24V-20W/W/FG) Halogen Lamp — 20W | 24V Low Voltage | 30° Wide Flood | GZ4 Mini 2-Pin Base | Closed Front Glass

The Ushio Professional 1001004 (JDR/M24V-20W/W/FG) Lamp is a commercial-grade, low-voltage tungsten halogen mini reflector bulb engineered for marine vessel interiors, transit system carriage lighting, luxury landscape accent wells, clinical medical inspection devices, and premium retail display showcases. Producing a uniform, widespread beam of 2925K warm white light, this compact 20-watt specialty lamp utilizes a mirrored dichroic reflector to map a 30° wide flood configuration with a flawless color rendering index of 100 CRI. Outfitted with an integrated **closed front glass lens cover** and an industry-standard GZ4 miniature 2-pin base, it provides a stable 2,000-hour rated average service life when driven by certified low-voltage 24V step-down networks.

ADL Supply Expert Application & Replacement Guide

The Ushio JDR/M24V-20W/W/FG mini reflector halogen lamp is an established electrical maintenance baseline specified universally across luxury cruise liner hulls, municipal transit fleets, automated medical diagnostic instruments, and high-end residential or commercial landscape accent installations. Utilizing a high-purity clear quartz inner capsule nested within a mirrored dichroic glass reflector, this specialty bulb projects a uniform wash of 2925K warm white light. This enables visual display contractors and infrastructure engineers to secure a continuous, full-spectrum distribution field, achieving maximum visual contrast and vibrant shadow-casting without generating the frequency gaps common in alternative solid-state sources.

Critical 24V Low-Voltage Circuit Requirements and Closed Front Glass Advantages: Field electricians and facility maintenance crews executing routine equipment repairs must verify system voltage constraints prior to check out: this lamp operates natively on specialty 24V low-voltage tracks and strictly requires a compatible step-down magnetic transformer or regulated DC power supply to operate safely. Forcing or bridging this 24V bulb across standard 12V low-voltage tracks will yield a severely dim output, while connecting it directly to standard 120V or 277V mainline building grids will trigger immediate filament burnout and a high-pressure quartz envelope explosion.

Furthermore, because this specific configuration incorporates a factory-sealed **closed front glass protective lens (FG)**, it forms a built-in safety shield that shields the inner burning capsule from environmental dust, ambient humidity, and oil contaminants. This physical glass barrier also provides continuous ultraviolet (UV) filtration at the aperture line, making it fully approved for use inside open-face track fixtures, exposed landscape well cylinders, or display cases without requiring secondary external shielding assemblies.

Detailed Product Specifications

• Brand Name: Ushio America (Ushio Technical Specialty Halogen Portfolio)
• Product Series Line: JDR Specialty Voltage Halogen MR11 Mini Reflector Series
• Ushio Factory Product Order Code SKU: 1001004 (Updated unified inventory model identifier)
• Manufacturer Description Model Nomenclature: JDR/M24V-20W/W/FG
• Core Technology Class: Thermal Incandescent — High-Temperature Tungsten Halogen C-6 Filamental Reflector
• Primary Control Requirement: 24V Step-Down Magnetic Transformer or Regulated DC Power Supply
• Operational Power Draw: 20 Watts
• Nominal System Operating Voltage: 24 Volts AC/DC Low-Voltage Circuit Baseline
• Initial Luminous Brightness: 200 Lumens (Post standard laboratory seasoning burn)
• Color Temperature Configuration: 2925K Warm White
• Color Rendering Index (CRI): 100 Ra (Flawless Continuous Full-Spectrum Energy Distribution)
• Filament Type Geometry Class: C-6 (Heavy-Duty Coiled Axial Resistance Filament Track)
• Base Type Configuration: GZ4 Miniature Single-Ended 2-Pin Plug Base (4.0mm pin pitch centers)
• Reflector Geometry Class: MR11 Multi-Faceted Mirrored Dichroic Coating (/M)
• Front Glass Configuration: Closed Face — Integrated Hard Glass Protective Front Lens Shield (/FG)
• Optical Beam Dispersion Profile: 30° Wide Flood (/W)
• Maximum Overall Length (MOL): 1.38" Inches / 35.0mm Actual Body Height Base-to-Lens Face
• Nominal Bulb Rim Diameter: 1.38" Inches / 35.0mm Maximum Outer Casing Reflector Width
• Rated Average Service Lifespan: 2,000 Hours (Based on standard continuous cycling laboratory metrics)
• Chassis Burn Position Limit: Universal — Operates reliably at any horizontal, vertical, or tilted mounting angle
• Manufacturing Craftsmanship Location: Premium Quality Certified Craftsmanship Made in Japan

Operation, Safety & Mounting Compliance

High-Temperature Quartz Regenerative Halogen Halide Cycle Controls

This low-voltage lamp operates via an internal chemical loop where vaporized tungsten particles bond with halogen gas molecules inside the heated chamber. This compound cycles back onto the burning C-6 filament tracks, redepositing the tungsten to preserve filament mass. For this cycle to work cleanly and prevent wall-blackening, the inner envelope must continuously transcend a high temperature threshold exceeding 250°C, making proper convective venting inside track cylinders or landscape housings mandatory.

Commercial Equipment Industry Cross-References

This premium 20W 24V GZ4 MR11 bulb serves as a direct drop-in replacement or alternative for the following lines:

• Osram Sylvania alternative: 20MR11/W30 GZ4 24V / Closed Front Wide Flood Halogen / Order Code SKU Match
• GE Lighting Match: Q20MR11/FL30 GZ4 24V ConstantColor / Technical Reference Code Equivalent
• Alternative Ushio Configuration (Open Face Spot): 1000624 (JDR24V-20W/G/SP19) 24V Open Face Narrow Spot Line

Bulk Commercial Lighting Supply & Project Support

ADL Supply delivers commercial-volume logistical fulfillment, tiered commercial contractor discounting strategies, and full pallet project quoting options to electrical accounts across the United States.

For formal wholesale inquiries, volume pricing modifications, or manufacturer spec sheet documentation, reach our commercial branch directly at 1-800-235-3489. We are your commercial supply partners as an authorized wholesale Lighting Distributor In Doral, Florida.