Monitoring of customer bandwidth demand is accomplished by comparing mean access router uplink utilization to a prescribed threshold value that is computed based upon granular measurements of uplink utilization. The transparent amorphous carbon layer has a low absorption coefficient such that the amorphous carbon is transparent in visible light. If the lamp is open, a tuning capacitor current of an oscillator, which provides a reference clock for driving a switch of the inverter is incremented so that a clock frequency which is a basis for a switching speed of the inverter is boosted. The enclosure may be optionally transparent or opaque and thus the light source for decoration purposes may be provided in the liquid or in the base as needed.