# Drift Light

Drift Light is a static bedroom sleep environment resource with practical tools for evening light, screens, sleep timing, room temperature, humidity, airflow and morning light.

## Core tools
- [Bedtime light routine builder](https://drift-light.com/bedtime-light-routine-builder/): Build a practical evening light routine from bedtime, screens and lamp type.
- [Blue light evening exposure estimator](https://drift-light.com/blue-light-evening-exposure-estimator/): Estimate evening screen and room-light load before bed, then choose the first reduction step.
- [Bedroom sleep temperature planner](https://drift-light.com/bedroom-sleep-temperature-planner/): Compare bedtime and morning temperature patterns and choose one room change to test.
- [Bedroom humidity and condensation checker](https://drift-light.com/bedroom-humidity-condensation-checker/): Use room temperature, RH and window clues to judge next-night condensation risk.
- [Seven-night sleep environment experiment](https://drift-light.com/seven-night-sleep-environment-experiment/): Create a one-week bedroom test across light, screens, temperature, humidity or airflow.
- [37-minute Drift mode simulator](https://drift-light.com/drift-mode-simulator/): Preview a warm-to-low bedside fade inspired by the original Drift Light idea.
- [Night shift sleep light planner](https://drift-light.com/night-shift-sleep-light-planner/): Protect a post-shift sleep block with safe light timing and a dark bedroom handover.
- [Child and teen bedroom sleep environment checker](https://drift-light.com/child-bedroom-sleep-environment-checker/): Review screens, warm light, night lights and room comfort for older children and teens.
- [Sleep comfort running cost calculator](https://drift-light.com/sleep-comfort-running-cost-calculator/): Estimate overnight running cost for fans, heaters, dehumidifiers or portable cooling.
- [Morning light reset planner](https://drift-light.com/morning-light-reset-planner/): Pair morning light with an earlier evening wind-down when your sleep clock has drifted late.
- [Sleep cycle bedtime calculator](https://drift-light.com/sleep-cycle-bedtime-calculator/): Calculate bedtime windows from wake time, age band and wind-down time.
- [Chronotype light quiz](https://drift-light.com/chronotype-light-quiz/): Estimate whether your routine leans early, balanced or late, then tune light timing.
- [Sleep debt recovery planner](https://drift-light.com/sleep-debt-recovery-planner/): Turn a short-sleep week into a realistic recovery plan without wrecking the routine.
- [Screen cut-off planner before bed](https://drift-light.com/screen-cutoff-planner/): Choose the latest sensible screen cut-off from device type, brightness and bedtime.
- [Wake-up light and sunrise alarm planner](https://drift-light.com/wake-up-light-planner/): Plan a gradual wake ramp, curtain timing and first-light cue for the morning.
- [Jet lag light shift planner](https://drift-light.com/jet-lag-light-shift-planner/): Build a gradual light-timing plan for moving sleep earlier or later before travel.
- [Temperature and humidity sleep planner](https://drift-light.com/combined-temperature-humidity-sleep-planner/): Combine room temperature, humidity and feel into one bedroom comfort action.
- [Bedroom airflow and window planner](https://drift-light.com/bedroom-airflow-window-planner/): Choose a simple night airflow setup without direct draught or morning condensation.
- [Caffeine and light sleep timing planner](https://drift-light.com/caffeine-light-sleep-timing-planner/): Pair last-caffeine timing with evening light changes so the routine feels realistic.
- [Early waking light routine checker](https://drift-light.com/early-wake-light-routine-checker/): Check whether early-morning light, temperature or room cues are pulling wake time forward.

## Guides
- [Bedroom light for sleep: a practical evening setup](https://drift-light.com/bedroom-light-for-sleep/): How to shape bedroom light before bed with warm lamps, screen boundaries and a simple fade.
- [Evening blue light and screens before bed](https://drift-light.com/evening-blue-light-and-screens/): A practical guide to close screens, bright rooms and the last hour before sleep.
- [Bedroom condensation and sleep comfort](https://drift-light.com/bedroom-condensation-and-sleep/): Why windows mist overnight and how humidity, ventilation and temperature interact.
- [Bedroom temperature for sleep: practical UK room guide](https://drift-light.com/bedroom-temperature-for-sleep/): How to read bedroom temperature patterns without chasing one perfect number.
- [Seven-night bedroom reset plan](https://drift-light.com/seven-night-bedroom-reset/): A simple week-long reset for light, screens, temperature, humidity and airflow.
- [The original 37-minute Drift Light fade](https://drift-light.com/drift-light-original-37-minute-fade/): How the simple warm-to-low fade idea can anchor a modern bedroom routine.
- [Sleep cycle vs circadian rhythm](https://drift-light.com/sleep-cycle-vs-circadian-rhythm/): The difference between cycle timing and the daily body-clock routine.
- [How long before bed should screens stop?](https://drift-light.com/how-long-before-bed-should-screens-stop/): A practical screen cut-off guide based on device distance, brightness and activity.
- [Morning light exposure for better sleep timing](https://drift-light.com/morning-light-exposure-for-better-sleep/): How a morning light anchor supports an earlier and more stable bedtime.
- [Night shift bedroom setup](https://drift-light.com/night-shift-bedroom-setup/): How to protect a daytime sleep block after late or overnight work.
- [Sleep debt recovery with a light routine](https://drift-light.com/sleep-debt-recovery-with-light-routine/): How to catch up after short sleep without pushing the clock later.
- [Kids and teen bedroom light routine](https://drift-light.com/kids-teen-bedroom-light-routine/): A practical room routine for older children and teens around screens and night light.
- [Bedroom airflow and sleep comfort](https://drift-light.com/bedroom-airflow-and-sleep/): How to use window opening, vents and fans without creating draughts or noise problems.
- [Wake-up lights and sunrise alarms](https://drift-light.com/wake-up-light-and-sunrise-alarms/): When a gradual morning light ramp helps and when routine consistency matters more.
- [Jet lag light timing before travel](https://drift-light.com/jet-lag-light-timing/): Use morning and evening light cues to shift a sleep schedule gradually before a trip.

## Boundaries
- The tools are practical room-planning aids, not medical diagnosis or treatment.
- The site does not claim to measure lux, spectrum or melatonin from user inputs.
- Calculator outputs should be read as planning bands and next-night experiments.