Osram Halogen Eco Pro Classic lamps are replacers for incandescent bulbs. The Eco Pro has a lower energy consumption but has the same fitting as most incandescent bulbs: either the E27 big screw fitting or the E14 small Edison screw fitting (SES). The Osram Halogen Eco pro works on 230V and doesn't need a transformer. The built-in UV block prevents discoloring by the emitted light. When replacing your light source, check out the light color and wattage usage to keep the same light effect.
Cap / Base
The cap/base of a bulb is the part that connects it to the socket in the fixture. In the UK, B22 (Bayonet) caps/bases are still the most popular, although E27 (Edison screw) caps/bases are becoming increasingly popular. GU10 is the most common cap/base for spotlights. Check which cap/base you need carefully as many other types are also available.
Colour temperature (Kelvin)
The colour temperature refers to the colour produced by a light. It's measured in Kelvin (K) and ranges from warm white (1700K - 3000K) to daylight white (6500K). Neutral white (3100K - 5000K) is mainly used for general lighting applications.
The colour code is a combination of the colour rendering index (CRI) and the colour temperature (K). The first number refers to the CRI (1 = very poor colour rendering, 9 = maximum accuracy). The second and third numbers refer to the colour temperature. For example, a light with a colour code of 830 has very good colour rendering and produces a warm white light.