CPTED Lights theWay from Page 41


Lighting is a vital component of car park security, but it is


not just about adding quantity and brightness. CPTED takes a very pragmatic approach to lighting – as it doeswith all elements of security – considering all the factors to deliver the greatest advantage.Adherence to CPTED lighting recommendations can provide car park owners and operators with a vital security edge.


Lights, Camera, Action If a car park records CCTV footage, the type of source light


is an important decision. For this reason, parking lot owners and operators should be aware of the color rendition of the type of lighting selected. The color rendering index (CRI) is a method ofmeasuring the ability of a light source to accurately reproduce the true color of an object, which is essential for clear playback of CCTV recordings. Light sources with a high CRI are optimal for CCTV. Today’s car parks commonly use high-pressure sodium


vapor (HPSV) lamps and mercury vapor lamps because they are commercially available, commonly used on roadways and high- ways, and inexpensive.Another alternative has also been low- pressure sodiumvapor (LPSV) lamps.BothHPSVand LSPVare not ideal for CCTV because they have a low CRI. Up until now,mostCPTEDpractitioners recommendedmet-


al halide bulbs because they provide aCRI of 90 out of 100, how- ever, new lighting alternatives are emerging. “On the horizon, new light sources such as light-emitting


diodes (LED) and induction lamps may ultimately change the way we approach lighting,”Atlas predicts. Developed for themilitary in the 1990s, induction lamps can


last over 100,000 hours and be virtuallymaintenance free for over 25 years for most users, because they do not have filaments or electrodes.The CRI for induction lamps is 80. “Induction lighting is good for applications with high ceil-


ings that require high-color rendition andmaintained lighting lev- els, such as car parks,” saysAtlas. “Induction lighting has instant- on capability and can be usedwithmotion sensors for quick iden- tification and/or camera usage.” Atlas warns that induction lamps runmuch hotter than other


types of fluorescents, and require additional energy for ventila- tion and cooling, and careful handling. LED (light emitting diode) lights are also growing in popu-


larity.These advanced technologies convert electron flow to visi- ble light. “With no fragile glass to break, and no gases to escape, LED


fixtures can endure conditions that would severely destroy con- ventional lamps,” Atlas adds. “LED luminaries are being designed to replace street lights, pedestrian sidewalk lighting, and wall packs.” Atlas also points out that new technologies, using such


advancements as laser and short wave infrared, are being devel- oped for surveillance and CCTV in conditions where there is minimal light.


Pete Goldin is the Technology Editor for Parking World. He can be reached at pete@parkingworld.com.


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