angles appearance attached clean-energy electricity energy energy-generating energy-saving fixed framed frames generating glass green-energy metal metal-sheeting modern panels perspective perspectives position power ridged ridges roof rooftop rooving saving savings shade shadow shadows solar solar-power sun sunlight sunshine surface technology orange terracotta tiled tiles air-vent energy saving historical mughal natural lighting ventilation widow ancient energy saving bulb lamp lamp post lantern old lamb post storm lamp street lamp bright bulb fluorescent glow green illuminate illuminated illumination light long life low power purple white broken bulbs debris disposal dumping ground dumpsite electronic environmental lamps lightbulb lights pollution quicksilver rubbish save throwaway society waste