light governs plant cycles, animal behavior, and human sleep. cyberia treats outdoor light as managed, not ambient.
color temperature
- all outdoor fixed lighting: 2200 K or warmer (amber spectrum)
- warm color prevents circadian disruption in humans and suppresses the confusion effects on insects, amphibians, and nesting birds that broadband white causes
- blue-enriched (> 3000 K) lighting prohibited outdoors anywhere on the estate
direction and shielding
- all outdoor luminaires fully shielded: light directed downward, zero upward emission (full cutoff IES classification)
- no floodlights illuminating canopy or forest understory
- path lighting: ground-level bollards at maximum 0.6 m height preferred over pole-mounted fixtures
intensity limits
| zone | max illuminance at surface |
|---|---|
| paths and entrances | 20 lux |
| parking and service | 10 lux |
| forest edges and gardens | 5 lux |
| conservation buffer | 0 lux (unlit) |
curfew
- non-essential outdoor lighting off by 23:00 or end of last event, whichever is later
- security lighting: motion-activated only, minimum 30 s timeout, no continuous-on fixtures
- decorative string lights: off by 23:00
sky quality
cyber valley sits away from urban light domes — the Milky Way is visible on new moon nights. maintaining this matters for:
- species that navigate by starlight (insects, birds, sea turtles if near coast)
- cultural and scientific value of a dark sky
- astronomical observation
target: Sky Quality Meter (SQM) reading > 21.0 mag/arcsec² at zenith on new moon nights
indoors
- no requirement for indoor color temperature — residents choose their own light environment
- recommendation: shift to 2700 K or amber by 20:00 to support natural melatonin onset