The high intensity discharge (HID) fixture has provided a combination of low quality light, high energy consumption, and operational inconveniences for many decades. Fortunately, exceptional results from HID retrofits including replacing them with T5 or T8 fixtures offer new opportunities to provide improved lighting using less energy.. Retrofits also provide an added benefit of allowing lighting controls, which prevents re-strike delays. To date, the market response to utility-offered incentives tor HID retrofits has far-exceeded initial projections and the energy savings produced has comprised' a surprisingly significant portion of total portfolio savings. This paper assesses various'HID replacement measures and incentives offered by utilities across the country. It compares'the actual measure up-take rates to initial plans. In some inarkets, HID conversions'are providing more than twice the measure savings initially proposed in the portfolio plans. This review of HID retrofit programs improves measure design and evaluation efforts by highlighting measure benefits and discussing the potential for receiving utility incentiyes to reduce implementation costs. Program designers can use this information to help set better targets for this popular energy efficiency measure.
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