Why are other technologies such as fiber optics and LEDs not included in the common fixture models?
The section of the standard that defines calculation of fixture wattage mentions some of the more common technologies only in terms of how to calculate their wattage for compliance. This same section also provides information on wattage calculation for all other (less common) technologies. The LPD models are meant to characterize common modern lighting design to represent typical current construction. Fiber optics and LEDs are certainly used in building lighting but are not as yet common primary lighting sources for general interior illumination and therefore are not specifically represented in LPD models. The standard does not preclude the use of any lighting system or technology. The standard only supplies power limits and controls and other mandatory requirements that can be met using any appropriate technology.
