The package of the Duris S 5 is made from robust synthetic material that is resistant to aging caused by high temperatures and short-wave blue light. This feature allows a longer operating live expectancy that with LEDs in other package materials – more than 35,000 hours promises vendor Osram. And this even at an elevated ambient temperature of 105°C.
The main applications for the new Duris are retrofits and luminaires for both linear and area indoor lighting, as used in places such as offices, hotel lobbies and museums. The square footprint and the small round light-emitting surface translate into a compact arrangement in the lamp. This in turn means that the light can be efficiently coupled into secondary optics such as lenses and reflectors.
The new Duris is being launched in three versions with different chip surfaces and therefore three different brightness levels. The ideal application for the first version is wherever a large amount of light has to be emitted from a small surface area, for example in downlights and LED retrofits. At 3000 K and a CRI of 80 it achieves very high brightness of 97 lm along with an efficacy of more than 100 lm/W at an operating current of 150mA. Its optimized forward voltage of around six V means that efficient driver solutions can be used that have a beneficial effect on the cost-effectiveness of the overall system.
The second version is designed for high efficacy, achieving 125 lm/W at 65 mA with 24 lm at 3000 K. It is therefore designed for use in panel luminaires and linear retrofits in which individual light points should not be visible and low energy consumption is an important consideration.
For these applications there is an alternative in the shape of version three, which has only a slightly lower efficacy and is designed for optimum system costs. It achieves an efficacy of 113 lm/W with a brightness of 28 lm – also at 3000 K.
The certification process for the high lifetime standard of LM-80 with 10,000 hour tests is already under way. An initial announcement is expected in early summer.
For more information on the Osram Duris S 5 see https://catalog.osram-os.com/catalogue/catalogue.do;jsessionid=2A896BFE4C25920962B827F85DAD68D5?act=showBookmark&favOid=000000080001cd32000f0023