Lamp with optoelectronic light source and improved isotropy of radiation

A lamp comprising:

• an optoelectronic light source having an anisotropic light radiation distribution with a main radiation direction, wherein radiated light intensity decreases with increasing angle with respect to the main radiation direction;
• a first bulb at least partially surrounding the optoelectronic light source;
• a reflector element provided as a coating of reflective material disposed on an exterior of the first bulb and configured to reflect light emitted by the optoelectronic light source, the reflector element having at least one opening defined therein through which light emitted by the optoelectronic light source passes;
• and
• a diffuser element configured to diffusely scatter light passing through the at least one opening of the reflector element.