Product Overview
OSRAM Decostar 51 41870 SP — 50W 12V 10° Spot GU5.3 MR16 Halogen
The OSRAM Decostar 51 41870 SP is a 50W, 12V low-voltage halogen MR16 reflector lamp with a 10° spot beam and a GU5.3 base. Its dichroic reflector directs up to 66% of the lamp's heat out through the back rather than into the beam, making it a reliable choice for illuminating heat-sensitive displays. This is the open-face version — no cover glass — of the Decostar 51 line.
WATTAGE 50W 12V Low Voltage | BEAM ANGLE 10° Spot | LUMINOUS INTENSITY 10,000 cd Per manufacturer's table | COLOR TEMP 2,950K Ra=100 / CRI 100 | RATED LIFE 2,000 hrs Average |
Technical Specifications
| Order Code | 41870 SP |
| Wattage | 50W |
| Voltage | 12V |
| Base | GU5.3 (Bi-Pin) |
| Beam Angle | 10° (Spot) |
| Luminous Intensity | 10,000 cd |
| Color Temperature | 2,950K |
| Color Rendering Index | Ra=100 (CRI 100) |
| Average Rated Life | 2,000 hours |
| Dimmable | Yes |
| Reflector | Dichroic — reduces heat in the light beam by up to 66% |
| UV Filter | Yes |
| Cover | Open face — no cover glass |
| Diameter | 50.7mm |
| Overall Length (MOL) | 46mm |
| ILCOS Code | HRGS//UB-50-12-GU5.3-51/10 |
| Luminaire Compatibility | Low-pressure discharge vessel — for use in open luminaires per IEC 60432-3 |
| UPC/EAN | 4050300012636 |
Product Overview
The DECOSTAR 51 Standard line is the classic dichroic-reflector MR16 halogen lamp: most of the heat the lamp produces is emitted out through the rear of the reflector rather than forward into the light beam, cutting heat in the beam by up to 66%. That makes it easier to present heat-sensitive objects — merchandise, artwork, textiles — under bright accent light without the thermal stress a standard reflector lamp would add.
The 41870 SP pairs a 10° spot beam with 10,000 candela of luminous intensity at 50W, delivering Ra=100 (perfect color rendering) light at 2,950K. It is fully dimmable, includes a built-in UV filter to help protect illuminated materials from fading, and — as an open-face lamp with no cover glass — is rated as a low-pressure discharge vessel for use in open luminaires per IEC 60432-3.
Compatible Applications
- Retail displays and boutique lighting
- Galleries and museums — heat-sensitive exhibits
- Residential accent lighting — artwork, architectural features
- Hospitality — restaurants, bars, and hotel accent lighting
Before Ordering – Verify
- Confirm beam angle (10° Spot) matches your fixture's optical requirement.
- Confirm wattage (50W) and voltage (12V) match your transformer and fixture rating before ordering.
- This lamp requires a compatible 12V magnetic or electronic transformer — confirm transformer compatibility before ordering.
- This is an open-face lamp with no cover glass — confirm your luminaire is rated for open-lamp use per IEC 60432-3 before installing.
Safety and Handling Guidelines
- Allow lamp to cool completely before handling or relamping.
- Do not touch the glass with bare hands — skin oils can cause premature lamp failure under heat.
- Disconnect power at the fixture before installing or removing this lamp.
- Install only in fixtures rated for this lamp's wattage and voltage, and rated for open-lamp (no cover glass) use.
Compliance
- Manufactured by OSRAM.
- Low-pressure discharge vessel — for use in open luminaires per IEC 60432-3.
- UV filter integrated.
Ordering Information
- Order Code: 41870 SP
- UPC/EAN: 4050300012636
- ILCOS Code: HRGS//UB-50-12-GU5.3-51/10
- Sold individually unless otherwise noted on the product page.
For wholesale pricing, bulk availability, or help confirming the correct replacement lamp, contact ADL Supply at 1-800-235-3489.
