point source point of departure rootage point fountainhead headwater spring root place of origin wellspring beginning origin cradle headspring trailhead wellhead home birthplace derivation provenance jumping-off place head trail head provenience

inspiration seed muse germ taproot

source materials papers wellspring written document fountainhead document well

gold mine installation facility Golconda goldmine

corona counterglow candle flame glowing lamplight sunlight firelight friar's lantern radiance moonshine sunshine electromagnetic spectrum gaslight torchlight actinic radiation scintillation daylight ray ignis fatuus fluorescence streamer starlight glow incandescence shaft of light will-o'-the-wisp shaft beam of light irradiation half-light sun light beam visible radiation jack-o'-lantern visible light meteor shooting star moonlight candlelight Moon twilight luminescence actinic ray gegenschein beam ray of light

headlamp houselights fairy light running light sconce theater light anchor light navigation light headlight strip lighting riding light flood jacklight light source photoflood torch panel light riding lamp flasher flood lamp night-light floodlight searchlight sidelight source of illumination blinker room light

low-density weight lightweight buoyant airy lighter-than-air floaty

position view perspective

floodlight illume light up lighten up spotlight illuminate lighten illumine

illuminance luminousness glow bright luminosity luminescence luminance dull brightness level physical property incandescence brightness illumination