On what was then the edge of Rožnov, the textile firm ELITE was building a factory – it planned to make stockings here. In November 1948, however, the government decided to transfer the unfinished buildings to the national enterprise TESLA; a founding charter of 26 July 1949 then created Tesla Rožnov.
Building went quickly: work on the first industrial building started in January 1949, and by the end of that year production and heating were running in it. The first product to leave the factory gates, in the autumn of 1949, was a high-pressure mercury lamp for “sun lamps”Quartz lamps for home sunbathing cures – they imitated the intensity of mountain sunlight, where thinner air lets through more UV than in the lowlands. They were used at home and in spas against rickets and to make vitamin D. They are now known to have done harm: a high-pressure mercury lamp emitted a great deal of UV-C, the most dangerous kind of radiation, which damaged skin and eyes and could cause skin cancer. Mercury lamps are therefore no longer made in the EU..
In its first year the works employed over 1,300 people, most of them women – recruitment was still running to the original textile plan.