When it comes to accent lighting, recessed fixtures, or landscape spotlights, few bulb types are as popular—or as misunderstood—as MR bulbs. And if you’ve ever shopped for replacements or upgrades, you’ve likely found yourself wondering: MR11 vs MR16—what’s the difference?
Though they look similar at first glance, these two bulb types differ in size, beam angle, wattage, and application. Choosing the wrong one could mean poor lighting results or an ill-fitting bulb, especially in tight spaces like under-cabinet lighting or track systems.
In this guide, we’ll break down the key differences between MR11 vs MR16, help you figure out which one fits your fixture, and explain how to pick the right LED replacement for any space.
What Does “MR” Stand For?
Before we get into MR11 vs MR16, let’s cover the basics.
“MR” stands for Multifaceted Reflector. These bulbs are designed to focus and direct light using a built-in reflector, making them ideal for spot or directional lighting.
They’re most commonly used in:
- Track lighting
- Recessed lighting
- Display cases
- Landscape lights
- Accent lighting
- Under-cabinet fixtures
Both MR11 and MR16 bulbs are available in halogen and LED options—but LED is now the standard for longer life, energy savings, and lower heat output.
MR11 vs MR16: What’s the Real Difference?
Here’s a quick side-by-side comparison of the two:
| Feature | MR11 Bulb | MR16 Bulb |
| Diameter | 11/8 inches (≈35mm) | 16/8 inches (≈50mm) |
| Length | Shorter (typically 1.5–1.75″) | Longer (typically 1.75–2.25″) |
| Beam Spread | Narrower (more focused) | Wider options available |
| Brightness | Generally lower lumen output | Higher brightness range |
| Wattage | Typically 20–35W halogen | Typically 35–50W halogen |
| LED Equivalents | 2–4W LEDs | 5–7W LEDs |
| Base Type | GU4 (2-pin) | GU5.3 (2-pin) |
| Best Use | Small fixtures, tight spots | Track, recessed, accent lighting |
Want a deeper dive into applications and real-world comparisons? Check out this full breakdown on MR11 vs MR16.
Key Factors to Consider When Choosing Between MR11 and MR16
1. Fixture Size
This is the biggest determining factor. MR11s are more compact and designed for fixtures with limited space—such as small track lights, display cases, or landscape lighting where clearance is tight. MR16s are larger and more powerful, perfect for general accent lighting in larger recessed cans.
2. Light Output and Beam Angle
Need strong directional light for artwork or high ceilings? MR16’s broader beam options and higher brightness make them better for illuminating wide spaces. MR11s offer more narrow beams—ideal for focused spot effects.
3. Voltage Compatibility
Both MR11 and MR16 typically run on 12V (low-voltage), but always double-check your transformer and wiring setup. Using the wrong voltage can shorten bulb life or cause flickering.
4. Heat and Energy Efficiency
LED versions of both MR11 and MR16 bulbs drastically reduce heat output and energy consumption compared to halogen. MR16 LEDs usually offer more lumens per watt, making them slightly more efficient for larger applications.
Common Applications: When to Use MR11 vs MR16
Use MR11 For:
- Landscape lighting with compact housings
- Curio cabinets and display cases
- Small pendant or puck lights
- Tight, enclosed fixtures with space limitations
Use MR16 For:
- Track and rail lighting systems
- Recessed cans (especially in kitchens or offices)
- Retail accent lighting
- Artwork or architectural lighting
Pro Tip: Don’t Confuse MR16 with PAR16
While MR16 and PAR16 may sound similar, they’re completely different bulb shapes and technologies. MR bulbs use multifaceted reflectors and typically have a GU5.3 bi-pin base, while PAR bulbs have E26 screw bases and are shaped like standard spotlights.
For more on this comparison, check out the complete guide on MR11 vs MR16.
Why LED Is the Best Upgrade for Both MR11 and MR16
Halogen MR bulbs are being phased out due to inefficiency and heat. LED versions offer:
- Up to 90% energy savings
- Cooler operation (safe for enclosed fixtures)
- Longer lifespan (15,000+ hours)
- Dimmable options
- Better color rendering (CRI 90+ options available)
Whether you’re replacing MR11 or MR16 halogens, be sure to choose a high-quality LED with the correct base type and voltage.
Final Thoughts: Choose the Right MR Bulb for the Right Space
When it comes to MR11 vs MR16, it’s not about which is better overall—it’s about what works best for your specific space, fixture size, and lighting goals.
Use MR11 for compact, focused lighting. Use MR16 when you need more output and coverage. And always opt for LED to maximize performance and energy efficiency.
Still unsure? Get expert advice, detailed guides, and premium LED replacements at MR11 vs MR16 from BuyLEDOnline.
