186 TECHNOLOGY / THE ARC SHOW


After visiting this year’s ARC Show, our product reviewer David Morgan takes a look at the Panorama series of seamless luminaires from PJR Engineering.


THE FULL PICTURE


PJR Engineering is one of the UK lighting industry’s best kept secrets. Started back in 1974 as a general sheet metal supplier, it became one of Linolite suppliers. When Linolite was absorbed into the Concord lighting group three members of the Linolite design and development team took over PJR and started to create and produce their own lighting products both as an OEM sup- plier and also under their own brand. Currently their main markets are the UK and Middle East with most of the PJR products being linear fluorescent. Sales are increasing in the architectural lighting market and this is the target area for future development. Architects and lighting designers have always liked the effect of indirect cove lighting. Using standard linear fluorescent lamps can work well in this application if the lamps can be staggered to reduce the dark areas at the lamp ends. If staggering is not possible then cold cathode systems are available to create a continuous and seamless effect in smaller coves but this is


a more expensive option and they operate at high voltage with bulky remote ballasts. Seamless fluorescent lamps create a similar lit effect on straight runs to cold cathode but with lower initial costs and work with integral ballasts. With an easily replaceable, off the shelf lamp, the long term mainte- nance costs are also much lower. Seamless fluorescent lighting systems prob- ably originated with Nippo, the Japanese lighting company, who in 1997 developed a T6 linear fluorescent lamp with non- standard connection pins mounted on the side of the tube instead of at the ends thus allowing the tubes to mount end to end and the dark areas between lamps to be eliminated. Soon afterwards Feelux from Korea devel- oped a different design approach based on a T5 tube with an additional off centre mini connection T5 tube so that conventional T5 lampholders could be used. As a luminaire manufacturer, Feelux did not market the lamps to other lighting companies so it was not until Osram licensed the Feelux design


a few years ago and started producing their own seamless lamps that PJR and other companies had the opportunity to develop luminaires based on these lamps. PJR was quick to see the opportunity for seamless linear lighting when Osram intro- duced their Seamless Lumilux lamps and have now developed a surprisingly large range of luminaires for these lamps. The PJR Panorama Seamless Professional is the workhorse of the range for use in concealed cove lighting applications and comes in starter and joiner versions. With a slim body housing the ballast, the profile of the system is only 59mm high x 40mm wide. The starter unit comes with a flying lead to keep the size of the body as small as possible and to allow for flexibility of feed point in the cove. The joiner units plug onto the starter with a five-way connector and locking cover plate. It is available in three lengths – nominal 600mm, 900mm and 1,200mm - with both high output and high efficiency lamp options. Dimming is avail- able with integral Osram DALI ballasts or 1


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