Osram Dichroic Halogen Lamp 12V 20W MR16 44860

An Osram Decostar dichroic MR16 halogen lamp, 12V, 20W, GU5.3 base — a "cool beam" lamp whose dichroic coating directs heat rearward through the reflector rather than forward into the beam, making it suited to jewellery cases, art displays, and other heat-sensitive display lighting.

Will this fit my fixture?

If your existing bulb is a 12V GU5.3 MR16 halogen reflector, this is a direct twist-lock swap once power is off. Confirm your fitting runs on a 12V transformer, not 230V mains.

Key Features

• Dichroic coating reflects heat rearward, away from the lit object
• GU5.3 twist-lock base, 12V low voltage
• 36° flood beam, good colour rendering typical of halogen

Technical Specifications

Applications

• Museum and gallery accent lighting
• Jewellery and retail display cases
• Track lighting for heat-sensitive merchandise

FAQ

• Will this fit my fixture?
  Only if your fixture is 12V low-voltage with a compatible transformer and takes a GU5.3 MR16 reflector.
• What does "dichroic" mean and why does it matter?
  A dichroic coating reflects most of the lamp's heat backward instead of forward, so the light beam itself runs cooler — useful for lighting heat-sensitive displays like jewellery or artwork up close.
• How is this different from a standard MR16 reflector?
  A standard (non-dichroic) MR16 reflects heat forward along with the light; this dichroic version keeps most of that heat out of the beam, so it's the better choice for close-up display lighting.
• Do I need a transformer?
  Yes — this is a 12V bulb and requires a 12V transformer.