What is "ceravision"

Ceravision is a privately owned lighting company based in Bletchley Park, UK. Ceravision is the inventor of a range of electrodeless lamps and integrated luminaires under the trade name Alvara, the world's first High Efficiency Plasma (HEP) lamp. The Alvara range uses half the power and has half the total cost of ownership of competing ceramic metal halide lamps. Thus far, the lamp is not produced in styles suitable for the home and small business markets, but is marketed as bay lighting for large warehouse spaces, and as street lighting.