US lawWashingtonRegulationsTitle 468 — TRANSPORTATION, DEPARTMENT OFChapter 468-240 — OBSTRUCTION MARKING AND LIGHTING468-240-155WAC 468-240-155WAC 468-240-155. Intensity of lightingLast amended: 1996Year: 2026Length: 17 wordsOfficial source The intensity of fixed obstruction lights should be not less than ten candles of aviation red light.PreviousWAC 468-240-150NextWAC 468-240-160