Traffic lights made of LED seems pretty identical to typical traffic lights that are made of incandescent or neon bulbs. As LED traffic lights are much brighter than their typical counterparts they give the pedestrians and drivers a much clear indication about the traffic.
The advanced LED traffic sign employ LEDs rather than incandescent or halogen lamps. The LEDs are minute, single electronic lights created using applied voltage to a semiconductor chip & reflector in a small colored lens. In opposition, the incandescent made traffic lamps rely on a colored filter to generate the proper color. Whilst the price of the filter is inexpensive to generate, it’s a very ineffective way to illuminate the traffic signal. The red filter on a conventional incandescent signal lamp, for instance, obstructs 80% of the glow & wastes electricity.
The power savings of LED traffic signal is considerable. The LED made mini traffic light bulb employs about fifteen watts of energy, in comparison to the average of 100 watts of energy employed by the typical incandescent lamp. All traffic signals run 24 hours throughout the year. The price to illuminate an individual 100 watt incandescent red lamp every day is approximately 2.4 kilowatt hours, based on the present average of five cents per kilowatt hour which may be your city paying. Each intersection boasts an average 36 bulbs encompassing LED arrow board, pedestrian displays, red, green and yellow lights. The regular price to illuminate only the traffic signal heads is $5.40 per street intersection. Over the course of the year for 100 signalized intersections the energy cost to your city is approximately $200,000.
If all of the traffic sign bulbs were changed to LED, the daily charge to illuminate each lamp would be decreased from fifteen cents to 2.5 cents. The everyday fee to illuminate the traffic signals would decrease for every intersection from $5.40 to ninety cents. The yearly expense to illuminate the 100 signalized intersections reduces to less than $35,000.
Traffic signal LED lights are much brighter compared to incandescent lamps and survive an average of 10 years compared to 1 year, common for usual incandescent bulbs. Presently, the red lights in every traffic intersection are substituted every year, requiring the trucks & manpower to substitute the lamps which also ties up traffic. The LED signs are practically free of maintenance, eradicating yearly re-lamping expenses.