MR11 Halogen Spotlight GU4 10W 12V 2700K 30° – small spotlight, glass reflector

Requires a 12V transformer

This is a 12V low-voltage lamp that requires a 12V transformer to operate. The transformer converts the household 230V mains voltage to 12V. Compatible transformers (both electronic and magnetic) can be found in our selection under the Electrical Supplies → Transformers category.

Check transformer power

The transformer's power must match the power of the lamp (or the total power of multiple lamps). For example, for a single 10W lamp, the transformer must be at least 10W. For multiple lamps, calculate the total power and choose a transformer accordingly — it's often advisable to allow for a small reserve (e.g., four 10W lamps = 40W, choose a 50–60W transformer).

MR11 vs MR16 — an important distinction

MR-type low-voltage floodlights are available in several sizes:

• MR11 — diameter 35 mm, base GU4 (4 mm pins) — this product
• MR16 — diameter 51 mm, base GU5.3 (5.3 mm pins) — larger alternative

These are not interchangeable — different base and different size. Check the luminaire's base and lamp size requirements before ordering.

Typical applications

• Small spotlights and display case lights
• Chandeliers and decorative luminaires requiring a small spotlight
• Exhibition lighting and artwork illumination (in the background, not as the primary target due to prolonged exposure)
• Hotel and restaurant premises
• Old decorative luminaires where MR11 size is standard

Halogen lamp — usage considerations

Halogen lamps get hot during operation — do not touch the glass surface when the lamp is on or has just been switched off. The typical lifespan is 2,000–4,000 hours, which is significantly shorter than LED alternatives (15,000–25,000 h). However, halogen retains its advantages with a perfect CRI 100 color rendering, which is ideal for professional use (artworks, jewelry, colorful products).

Installation checklist

1. Check that the luminaire has a GU4 base (not GU5.3)
2. Check that a 12V transformer is used and that its power is sufficient for the total power of the lamps
3. Check that the lamp's dimensions (Ø35 × 35 mm) fit the luminaire
4. Turn off the power before installation — do not touch the lamp's glass with your fingers (grease can shorten its lifespan)
5. Install the lamp and turn on the power

Consider an LED alternative

If energy saving and longer lifespan are important, consider MR11 LED spotlights, which use about 80% less energy and last up to 25,000 hours. However, halogen retains its advantages with a perfect CRI 100 color rendering, which is particularly important for illuminating artworks and jewelry.