OSRAM GU4 (MR11) LED bulbs
OSRAM GU4 / MR11 LED Bulbs — Compact Low-Voltage Spotlights
OSRAM GU4 (MR11) LED bulbs are the small, low-voltage spots you specify when space is tight but the light has to be clean and efficient. Typical swaps are 20–35 W halogen MR11 → 2.5–4.8 W OSRAM LED, holding the same GU4 pins and 12 V supply. Result: up to 85 % energy saving, cooler fixtures, and far fewer relamps — without redesigning the luminaire.
OSRAM GU4 LED — Where They Fit (and Why They Sell)
- Display cases & shelves: tight optics (24°/36° beams) prevent spill light on glass.
- Hospitality & retail furniture: shallow fittings, low heat near products.
- Vehicles/boats/caravans (12 V): low load on DC systems, stable colour.
- Retrofit from MR11 halogen: keep transformers/drivers that output 12 V (see note below).
Commercial angle: one-for-one lamp swaps that cut energy and heat, improve colour consistency, and reduce service visits — ideal for multi-site rollouts.
OSRAM Miniature LED Lamps — Headline Numbers
- Power: 2.5–4.8 W (replaces 20–35 W halogen).
- Luminous flux: 180–420 lm (model/beam dependent).
- Beam angles: 24° / 36° / 60°.
- CCT: 2700 K / 3000 K / 4000 K.
- CRI: ≥80 standard, ≥90 options for colour-critical zones.
- Lifetime: 15,000–25,000 h (L70/B50); switching cycles >100k.
- Startup: <0.5 s to full output.
- Operating temp: –20…+40 °C.
- Dimming: phase-cut variants available; check driver/dimmer list.
OSRAM Low-Voltage LED Spots — Electrical Notes that Avoid Callbacks
- Supply type: most GU4 LEDs need 12 V DC or 12 V AC (electronic transformer) — verify on the datasheet.
- Legacy magnetic transformers: fine, but stay within min-load limits or change to an LED-rated driver.
- Mixing lamps: keep one batch/CCT per project (ΔCCT mismatch is visible in displays).
- Thermals: avoid sealed micro-fixtures with no airflow; keep Tc < 80 °C for lifetime.
OSRAM Small Spotlight LEDs — Quick Comparison vs Halogen MR11
Metric | Halogen MR11 20 W | OSRAM GU4 LED 3.5 W |
| Power | 20 W | 3.5 W |
| Output | ~200–250 lm | 250–350 lm |
| Efficacy | 10–12 lm/W | 70–100 lm/W |
| Lifetime | 1,000–2,000 h | 15,000–25,000 h |
| Heat at lamp | High | Low |
| Payback (2,000 h/yr @ €0.20/kWh) | — | <12 months (typical) |
OSRAM GU4/MR11 Range — What to Stock
- 2700 K / 36° / 250–300 lm: warm accent for hospitality; default spec.
- 3000 K / 24° / CRI90: retail highlights with tighter punch.
- 4000 K / 36–60° / 350–420 lm: cooler, brighter displays and task niches.
Bundle with LED-rated 12 V drivers where old electronic transformers don’t meet min-load.
Procurement Checklist (60-second version)
- Base & voltage: GU4, 12 V AC/DC match to existing gear.
- Beam: 24° accents; 36–60° general.
- CCT/CRI: 2700–4000 K; CRI90 for colour-critical.
- Transformer/driver: check min-load; swap to LED driver if needed.
- Thermal clearance: micro-fixtures still need airflow.
- Batching: order full batches for colour uniformity across sites.
Why Source OSRAM GU4 MR11 LED Bulbs from Bank of Lamps
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