Ushio

Ushio 1003301 50W Halogen MR16 GU10 Light Bulb

Name: Ushio 1003301 50W Halogen MR16 GU10 Light Bulb
Brand: Ushio
SKU: 1003301

★★★★★4.8 (10 reviews)

A 50W, 2,500-hour GU10 halogen MR16 delivering 1,400 initial lumens at 2750K through a 25-degree narrow flood beam — precision accent lighting at its most direct.

$11.76*

✓ In Stock on Amazon.com

View on Amazon

*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

Affiliate Disclosure: Studio Supplies may earn a commission from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.

Notice a mistake? Let Us Know

Overview

The Ushio 1003301 is a 50-watt, 120-volt halogen MR16 lamp in the GU10 base format, producing 1,400 initial lumens at 2750K through a 25-degree narrow flood beam. In lighting design terms, those numbers define a very specific tool: an intense, warm, precisely directed accent source optimized for close-range illumination of objects, displays, and architectural details where controlled beam placement and high apparent luminance are the design objective. The 2750K color temperature renders slightly warmer than tungsten standard, producing the rich, incandescent quality that makes materials like wood, fabric, metal, and gemstones appear visually warm and dimensional. The glass face cover is not simply protective — in many commercial and museum display standards it is required, containing the halogen envelope and reducing forward IR radiation to protect heat-sensitive items.

In application, the Ushio 1003301 is designed for commercial and residential accent lighting environments: retail display cases, gallery track systems, hospitality accent lighting, and architectural highlighting where LED beam optics have not fully replicated the continuous-spectrum, high-CRI rendering that halogen produces. The 2,500-hour rated life is honest and predictable under stable 120-volt conditions — meaningful for installations where replacement scheduling is managed as part of routine facility maintenance. The GU10 base provides broad fixture compatibility across the installed base of commercial track and recessed accent heads. The trade-off is fundamental to the halogen format: 50 watts of energy consumption, substantial infrared heat output, and a rated life measured in hundreds rather than thousands of hours compared to LED alternatives. For applications where halogen color rendering and beam precision are the non-negotiable design requirements, the Ushio 1003301 delivers both reliably.

Specifications

Brand

Ushio

Wattage

50W

Lamp Type

Halogen MR16

Base Type

GU10

Model Number

1003301

Pros & Cons

👍 Pros

The 25-degree narrow flood beam precisely isolates display objects and architectural features, delivering controlled accent light with minimal spill into adjacent zones.
At 1,400 initial lumens from 50 watts, the output-to-wattage ratio produces the intense, specular quality that makes products and artwork appear crisp and three-dimensional under accent lighting.
The 2,500-hour rated life provides a predictable replacement schedule for commercial installations, supporting maintenance planning in retail and gallery environments.
The glass face cover provides fragment containment in the event of bulb failure and reduces forward IR transmission — both relevant safety and preservation considerations in display case and museum applications.
The GU10 base is universally compatible with the full range of commercial track lighting, recessed fixtures, and adjustable accent heads, requiring no adapters or specialized luminaires.

👎 Cons

At 2750K the 1003301 renders significantly warmer than the 3200K tungsten standard — in mixed-source environments or on camera without white balance correction, the warmth shift is visually noticeable.
Halogen MR16 bulbs generate substantial radiant heat in the beam path — heat-sensitive materials, certain fabrics, and organic media should not be illuminated at close distances without UV/IR filtering.
The 50-watt draw is substantially higher than equivalent-output LED MR16 replacements, resulting in meaningfully higher energy costs and cooling loads in fixture-dense commercial installations.
The 2,500-hour rated life, while adequate, falls well short of LED alternatives measured in tens of thousands of hours, increasing replacement frequency and associated labor costs in hard-to-reach fixture locations.
Halogen technology degrades in color consistency and output as it ages — by the end of rated life, the bulb may shift toward a cooler color temperature and reduced lumen output compared to initial performance.

Frequently Asked Questions

What beam angle does the Ushio 1003301 produce, and what does 25 degrees mean for accent lighting applications?

The 1003301 produces a 25-degree narrow flood beam. At this angle, the beam diameter at one meter of throw distance is approximately 44cm — tight enough to isolate a specific object, display case item, or architectural feature without significant spill onto surrounding surfaces. For reference, a 10-degree spot would create an even tighter pool of light, while a 40-degree flood would spread more broadly.

What color temperature does this bulb produce, and is 2750K accurate for tungsten-balanced film or camera work?

The 1003301 outputs light at 2750K — slightly warmer than the 3200K tungsten standard used for film and video lighting calibration. In camera work, this bulb will read as warm orange-amber without appropriate white balance compensation. When used as a practical lamp in a scene, it contributes a visually warm, incandescent quality that complements tungsten-balanced fixtures.

How long will the Ushio 1003301 last in continuous commercial use, and how does that translate to replacement frequency?

The rated life is 2,500 hours. In a retail display or gallery running 12 hours per day, that equates to approximately 208 days of continuous use before replacement. In applications running 8 hours per day, expect roughly 312 days. Halogen life ratings are generally accurate under stable voltage conditions.

Does the glass face cover on the MR16 serve a safety or optical function?

The glass face performs both roles. It contains the halogen envelope in the event of catastrophic bulb failure, preventing glass fragments from reaching displayed objects or occupants — a code requirement in many commercial display and museum applications. Optically, it can also reduce IR radiation forward of the beam, protecting heat-sensitive materials on display.

Is the GU10 base a push-and-twist or pin-type mount, and what fixtures does it fit?

GU10 is a push-and-twist bayonet-style base with two flat-tipped pins spaced 10mm apart. It is one of the most widely used bases for MR16-format accent and track lighting fixtures in commercial and residential settings — it will fit any GU10-compatible track head, recessed fixture, or pendant designed for this base type.