The GU5.3 (MR16) format is widely used in low-voltage spot lighting: recessed down-lights, track lighting, display lighting, machine-vision illumination and architectural accent zones. With the shift from halogen to LED technology, quality and specification become critical. The Radium GU5.3 LED bulb range from Radium addresses this by offering industrial-grade LED spot lighting with full data sheets, branded reliability and retrofit-compatible footprints.

For distributors, contractors and OEM panel-builders, choosing Radium GU5.3 bulbs means access to a trusted brand, known technical performance, available datasheets and better support for specification-driven projects.

Radium GU5.3 LED Bulb Series & Technical Classes

Radium “LED Star” and “LED Essence NV-RetroFit” Series

Example: RL-MR16 20 DIM 3.0 W/12/WFL/GU5.3 → 3.0 W, 230 lm, 36° beam, dimmable, 12 V, GU5.3.
Example: RL-MR16 35 DIM 4.9 W/12/WFL/GU5.3 → 4.9 W, 350 lm, 950 cd, 36° beam
Example: LED Essence NV-RetroFit, GU5.3 MR16, 3.8 W, 12 V, warm white, dimmable

These variants cover a range of wattages, beam angles and dimming capabilities — allowing distributors and buyers to match application, retrofit scenario and project budget.

Technical Highlights

Typical beam angles: 35°–36° for good spot-effect.
Colour temperatures: typically warm white (2700 K–3000 K) or other common whites (e.g., 840 = 4000 K) in many Radium specs.
LED models referenced: 3.0 W to ~8.0 W replacing halogen equivalents of 20 W to 50 W.

Procurement & Specification Checklist for Radium GU5.3 LED Bulbs

When specifying or stocking these bulbs for professional projects, keep the following in mind:

Base / socket: Ensure the fixture supports low-voltage GU5.3 (MR16) lamps — typically 12 V. Many Radium models are clearly specified as 12 V GU5.3.
Wattage & luminous output: Choose a model matching or exceeding the previous halogen bulb’s performance. E.g., 4.9 W for ~350 lm in one Radium model.
Beam angle: Select beam angle according to application (spot, accent, track) — e.g., 36° is often used for more focused lighting.
Colour temperature & CRI: For display/architectural use, high CRI (≥ 90) models exist in Radium’s series. One spec shows CRI 97 and 345 lm from a 6.3 W MR16 GU5.3 model.
Dimmability: If the lighting application includes dimming, ensure the selected Radium model is dimmable (indicated in series name as “DIM”).
Pack/Box quantity & SKUs: Radium spec-sheet shows box content (10 pieces) for many GU5.3 models.
Spare parts & service strategy: Standardise on one or two wattage/colour temperature variants so inventory is simpler.
Brand & traceability: Since Radium is a recognized manufacturer, this supports specification, documentation and service reliability for your B2B clients.

Operational & Stock Management Benefits

For distributors, panel-builders and lighting contractors:

Standardizing on Radium GU5.3 means fewer SKUs and easier quoting for retrofit/installation jobs.
High-quality brand reduces return claims and improves reliability in field installations.
Clear specification reduces errors in orders: base type, voltage, beam angle, dimmable or not.
Offering high-performing GU5.3 LED bulbs allows upsell vs generic low-cost lamps, especially in projects demanding quality (display lighting, retail, machine-vision).
Integration: Since many clients already have MR16 fixtures, you can offer Radium retrofit GU5.3 LED bulbs and maintain existing hardware — which is attractive in upgrade projects.

Why Choose Us as Your Distributor

We supply genuine Radium GU5.3 LED bulbs with full manufacturer traceability and group-catalog support.
Our B2B wholesale model supports volume orders, project packs and repeat procurement for lighting contractors, panel OEMs and distributors.

Real-time stock visibility and EU logistics support ensures you can lock orders and align delivery with project schedules.