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Lighten Up
by Marc Spraragen
ANSWER: RAY
This puzzle is a Light-Up variant that acts on a triangular grid. Unlike regular Light-Up puzzles, colinear lights are permitted and have an additive effect. In addition, due to the triangular grid each light at the corner of a room effectively illuminates that room twice. The location of the lights is:
![](lighten_up_solution.gif)
The letterforms of these lights spell the answer RAY.