The district has changed all incandescent lamps (standard light bulbs like we use in our homes) to more energy efficient lamps. You will now find HID (High Intensity Discharge) type lamps, such as:

	HPS (High Pressure Sodium) The yellowish/orange lights you see in parking lots and street lights.
	LPS (Low Pressure Sodium) The yellowish/orange lights you see in parking lots and streetlights that make all cars look brown. Although they are one of the most efficient forms of exterior lighting, poor color rendition makes them unsuitable for use in our schools. Some may still be found but we are phasing them out.
	MH (Metal Halide) Much whiter light used in playground lighting. Older technology lamps suffered from very high degradation of lighting levels as the lamps aged.
	Compact Fluorescent lamps Smaller versions of the long, cylindrical lamps usually used in ceiling or wall-pack fixtures.

Some of our outside light fixtures have a Photocell or Photo-eye, which is a small device built into the fixture that detects if there is any outside ambient light available (i.e. the sun), and if there is, it won't let the light come on, thereby conserving energy. Other fixtures are controlled by timeclocks to regulate when they are turned on and off. This saves energy because it prevents lights from being left on during the day or when nobody is around to use them.