Indoor Parking

Urban areas often have parking that is on the upper floors dedicated to parking and some buildings are even entirely designed for parking. The lighting (including both the electricity bill and luminaire replacement) is often the largest cost, so if this cost can be reduced then that could contribute to a great reduction in the overall expenditure to building maintenance.

1. The entire area should be divided into 3 areas: areas adjacent to natural lighting, those that are are not daylit, and the main lighting.
2. Daylit areas should make use of the K40 monthly adjustable controller unit, the lights would turn on according to scheduled sunset times for each month; the lights would only turn off at off-peak times.
3. Areas that are not daylit should make use of regular timers to control all the lights in this area. Each day the timer would turn the lights on during peak periods and turn them off during off-peak periods.
4. The driveways, entrances, and elevator lobbies of a parking structure should keep the lights on all day long.
5. During off-peak periods, with only a handful of people left working overtime and their cars left in the parking area. For this reason, leaving the lights on just for these few people is not very economical. Thus, most of the lights should be turned off. Instead the lights should be controlled using motion sensors that would detect when a person leaves the elevator lobby and enters the parking area, then turn on the lights in that parking floor, which would then automatically turn off after a ten minute delay.

As such, it would be possible to save as much as 50% of the electricity cost and prolong the lifespan of the luminaries as well. For this, the LT3000 in conjunction with timers could be used, or a portion of the circuits could make use of the LT3504 together with the K40 (monthly adjustable timer) instead. If there is an attendant, then one could even add in the IS45 digital switch for easing the management of the lighting further.

Outdoor Parking

1. The lighting should be divided into the following. Small single lights should be grouped alternately, divided into circuit A and B. If there are instead large lamps, each set should have 2 to 4 lamp posts, and within each post, a K90 should be installed within.
2. The power for all the lights should be combined and controlled by a K40 controller, this way the lights can all be turned on together at the same time, and the turn on times would vary with the month, while the lights would turn off at the same time after business hours.
3. Circuit A and C would have K90 controllers installed to enable them to turn the lights off earlier.
4. Lighting for large shopping center areas that are away from the entrance are designated as D type areas. These areas are practically devoid of parked cars at night. As such, all the lights can be turned off during off-peak hours.
5. If there are attendants, then one could also have IS45s installed at the attendant’s booth to centralize lighting control for the entire area.

The above methods are more suited to making use of night sensors for group on and off.

1. If the practice before is to turn on the lights at dusk, and turned off after business hours.
   It is estimated that 35% energy savings can be attained. At the same time, lamp lifespan can be prolonged, which can reduce not just the need to replace the lamps more often but save on the labor costs for the replacement as well.
2. If the practice before is to turn on the lights at dusk, and to turn off the lights when the sun comes out. Then it is estimated that as much as 60% energy savings can be attained. There is also the additional benefit of prolonging the lamp lifespan which reduces the frequency of replacement, and with it, the savings gained from its associated labor costs.