Rome'stravertine facades absorb Mediterranean sunlight for twelve hours, then release it slowly under tungsten floodlights — a second life that begins when most tour groups retreat. The Colosseum's arches glow amber against cobalt sky during the civil twilight window between 20:15 and 21:00 in autumn, when residual daylight still holds detail in shadows. Sodium-vapor lamps installed in the 1990s were replaced with LED arrays in 2018, shifting the monument's nocturnal color temperature from 2200K to 3000K and allowing finer control of contrast across the ruin's four tiers. Rome night photography tour sessions cluster around sites where Baroque fountains meet modern street lighting — the Trevi's cascades under 150-watt spotlights, the Pantheon's portico columns lit from ground level to emphasize fluting depth, the Spanish Steps' travertine risers that hold light like stacked paper. Guides trained in manual exposure teach the reciprocity failure of long shutter speeds on older DSLR sensors, the ISO ceiling before digital noise corrupts stone texture, the hyperfocal distance needed to hold both foreground cobblestones and distant cupolas in acceptable sharpness. Pedestrian traffic drops seventy percent after 22:00, clearing sightlines that daytime crowds obscure. Piazza Navona empties enough to frame Bernini's Fountain of the Four Rivers without tourists crossing the shot. The Via dei Fori Imperiali becomes a light tunnel where car headlights streak into red trails at two-second exposures. Professional photographers leading these evening walks carry portable LED panels to fill shadows on portrait subjects without overwhelming ambient light — the goal is to integrate human figures into the illuminated cityscape, not isolate them against black backgrounds. Rome's historic center operates under a lighting ordinance restricting fixtures to 3000K maximum to preserve the warm tonality visitors associate with Italian cities. This regulation shapes the aesthetic vocabulary available to night photographers — no cool blues, no theatrical color washes, only variations on amber and cream. Monuments built in different centuries now share a unified color palette after dark, creating visual continuity that daylight's variable cloud cover never provides.