Industry News
Night-Time CCTV: The Future of CCTV Lighting
  Date:2010-2-13   Browse: 1138
There is no question that LEDs are the future of lighting. Their use has exploded in recent years and even traditional strongholds of the bulb such as car headlights and traffic signs are now adopting LED technology.  The key question is why are LEDs the future of Lighting?  Simple; it all comes down to two key benefits:
 
  • Significantly Longer Life
  • Significantly Lower Running and Maintenance Costs
Everyone knows about the long life delivered by LEDs but market understanding of the running and operational costs associated with lighting systems is much lower.  LEDs offer significant cost savings to the end user.  On CCTV applications using 100 LED illuminators can save the end user up to US$659,000 over a ten year period compared to a traditional 500W illuminator!  A saving large enough to convince any end user to use LED illuminators.  LEDs also provide increased security.  Unlike bulbs they don’t ‘blow’ so if an incident does occur the end user knows that the CCTV illumination will be 100% operational.
This article explains how to calculate the operational costs of your CCTV lighting highlighting the cost savings possible with LED based illuminators.  But first, it is essential to understand the fundamental characteristics of LEDs and the predecessors.
 
LEDs
LEDs are the fastest growing lighting solution for CCTV applications.  They are extremely efficient and offer unbeatable reliability.  LEDs offer the lowest possible running costs (less than 100 watts for highest power units) with the longest operating life (up to 10 years).
Light Emitting Diodes (LEDs) are semiconductors that naturally emit a narrow band of light.  They are a relatively new development in lighting but their usage is expanding rapidly on the back of clear technical advantages.  LEDs are comparatively expensive to purchase but provide extremely long life up to 100,000 hours.  In comparison fluorescent bulbs typically last 10,000 hours and incandescent bulbs 1,000 hours.  LED efficiency is typically 80-90% with the greatest efficiency coming from LEDs producing red light.  Advantages of LEDs include extremely low electrical consumption, low operating temperatures and continuity of colour through the operating life of the LED.  Unlike traditional bulbs LEDs are also highly durable, insensitive to vibration and their hard casing makes them difficult to break.  They are also capable of emitting light at a given wavelength without the need for a filter and are quick start devices.
Power management and thermal management are important to ensure LEDs deliver expected performance.
 
Latest Developments  
Through hole LEDs are expensive to mount to PCBs and generally are not as robust as Surface Mount Technology.  Surface Mount Technology (SMT) LEDs offer better thermal management and allow the LEDs to be ‘driven’ harder without compromising performance
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