Dtu Photonics Cast Lead - Light of the crown jewels

The royal family's crown jewels are prettier than ever. Actually, the gold was never so beautiful as now, and the diamonds as bright as ever. The reason for all the new luster is that the museum at Rosenborg Castle, has installed a new lighting system in the display cases - an LED lighting system - developed by Danish researchers at DTU Photonics in collaboration with Lumodan, and with support from the ELFORSK programme. Later, the producer Servodan joined the project. We are extremely pleased with the result, and for several reasons. We have the nations greatest treasures here in our Treasury and they should be presented properly. That they will through the new lighting. Compared to how things were before, it was almost like looking through a glass of tea, and that is for sure not the case with the new system. Now it all sparkles like it should, and that is very important. It is the researchers at DTU Photonics who are behind the development of the new LED lamps which combines high efficiency with high quality lighting. The graphs here shows the measured color composition of the old incandescent bulb lighting and the new LED lighting. We have worked hard to make the color composition so that the gold objects looks exactly the same in the new lighting as they did in the old lighting. The difference lies in that the LED lighting provides just slightly more blue light which actually gives a rather nice blue background of the disply cases. The really big difference is in the second part of the spectra in the thermal radiation, where there is lot of heat radiation from incandescent bulbs but none from the new LED lighting. The precondition for an ELFORSK result comes in use is that we have the whole value chain from the researcher to the user represented. This has been the case in this project where we have a researcher present, we have a producer, a supplier and a user represented. Yes, it has cost a lot of money. Fortunately, the Velux Foundation has helped us out. We must remember that we are saving 80% of our energy costs for lighting the Treasury and it is a lot in a year. Furthermore it is a much safer facility we have now which is both reliable in terms of fire but also to protect the objects since it will not generate as much UV radiation and almost no heat. Rosenborg Castle save money by the lower energy consumption lower cost of light bulbs and fewer maintenance costs. A total of 9.900 DKK in savings per. display case a year. Here, the blue line represents the past expenditure and the red line the costs with the new LED lighting. The payback time is within the first year. The specially developed LED lamps - PinoLED has great potential in museums, but also jewelry stores can see advantages in giving their jewelry and watches extra gloss and reducing energy consumption with an LED lighting system. I believe that LED lighting could be interesting. I can see that gold is having a better shine and a better brilliance in the new LED lighting and the amber also get a better shine. And that's very important to me since the customers better sees the jewelry which looks much better in the cabinets. LED lights consume less energy so my electricity bill is reduced. LED lighting will be able to decrease the temperature so the girls will have less need to polish since amber, silver and gold needs less polishing with the LED lighting. If all museums jewelers and watchmakers replaced their current lighting with LED lights it would be possible to save as much power as used in more than 2500 single-family homes or the equivalent of consumption in a city the size of Nykøbing Sjælland Lumodan has supplied the new lighting system to Rosenborg and are here working on installing the lights in a showcase in the Treasury. With a little imagination one could imagine that many other stores where color rendering of the products are important among others in paint stores and clothing shops could use the new technology. And research and development in LED systems are far from over. Right from the start has ELFORSK focused on LED. We want to continue the effort. It is absolutely essential for us to obtain results which has a quality we can vouch for. With the new LED lamps it is possible to combine high energy efficiency and high lighting quality with little heat generation. This means that the LED lighting system can provide users with better lighting for less money, and they constitute an interesting alternative both to the incandescent light bulb which will be phased out and the many CFL bulbs which results in poor quality lighting. Society can save large amounts of energy as LED lamps are gaining market shares and as shown by installing the new lighting system on the crown jewels at Rosenborg. Danish companies have the opportunity to succeed in further developing the technology and here the LED lighting. Servodan did exactly that. It gives more green jobs and good export possibilities.