In the outdoor pool at the Grand Hotel, a LED spotlight from LIGHT ON was used which fulfilled the high technical lighting requirements. The supplier had the challenging task of making the lights waterproof and guaranteeing their successful installation. The casing of the light is made from V4A chrome steel, while the specialist lens which focuses the light underwater is secured with a patented casting technique. The LED chip, with its high colour reproduction index and guaranteed binning, is infused in a transparent layer and is therefore one hundred percent waterproof. The light is designed so that it is completely gastight and airtight. Its water tightness is tested to 50 metres. It also withstands appreciable levels of pressure caused by ice. The even light emitted by the lamps and their high luminosity convinced and enthused the building owners.