Even if Light secured terrestrial reception, the illumination mechanics would expose him immediately. Portable displays in 2003 relied on cold-cathode fluorescent lamps (CCFL) or early white light-emitting diodes, pumping roughly 150 to 250 nits of luminance through a low-efficiency passive or active-matrix panel.
[Ambient Room Lighting]
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▼
Light's Eyes ◄────────[Specular Flare]
│ ▲
│ (Sightline) │
▼ │
[Chip Bag Interior] ──► [Curved Foil] ──► Pinholes Detect Spill
▲
│
[Mini LCD TV Screen] (Emitting ~200 nits)
Light operates in a softly lit bedroom to simulate normal high-school study habits. While his body shields direct lines of sight into the bag's aperture, light does not travel in an isolated vacuum. The interior lining of a potato chip bag is not matte black; it is a distorted, highly reflective concave mirror composed of irregular aluminum facets.
The light emitted from the LCD would bounce erratically off the curved interior foil walls, creating noticeable secondary light spill. To human observers monitoring high-resolution feeds on L's multi-display console, the mouth of the chip bag would pulse with dynamic, chromatic light shifts matching the rhythmic cuts of a television broadcast. Against the warm, steady hue of a desk lamp, fluctuating blue-white reflections would stand out immediately.
