Installed in a disused municipal greenhouse, Residual Sun consists of 126 resin panels cast with fluorescent pigment and fragments of discarded horticultural glass. During the day the work is largely passive: sunlight passes through the panels and projects unstable patches of yellow, green and red across the concrete beds. At dusk, concealed violet LEDs begin at a level determined by the afternoon’s measured daylight and gradually decline over three hours. The colour seen at night therefore records, imperfectly, the brightness of that day. Nothing is mapped onto the glass and no sequence repeats on command. Existing cracks, moss and rust were left untouched. The support clips are reversible, and the complete electrical load is lower than that of the two work lamps previously used in the structure. Panels were cast in the greenhouse so temperature and dust could enter the process; trapped seeds and air pockets were indexed but not graded out.