Dark Bedroom — Lights Out, LEDs Covered

Make the bedroom as dark as you can for the whole night — block outside light, cover standby LEDs and seal the gap under the door — because darkness is the signal for melatonin release.

Even brief light at night can disrupt the sleep-wake cycle and make it harder to fall back asleep.

The protocol

• Survey: lie in bed with the lights off and note every light source — street, standby LEDs, door gap, charger.
• Windows: block outside light with heavy curtains or blinds.
• LEDs: cover or turn away standby lights and chargers.
• Door: a rolled towel along the gap if hallway light comes in.
• Fallback: an eye mask where the room cannot be made dark.
• Night path: a low plug-in light on the route to the bathroom, not in the bedroom's line of sight.
• Duration: 2 weeks, then keep.

What you get

• Supports the dark signal that drives melatonin production.
• Fewer light interruptions that make it harder to fall back asleep.
• Usually a one-off fix.

Contraindications

• Older adults or anyone unsteady: never trade darkness for a dark path — keep a low night light between bed and bathroom.

Evidence level

Medium. The link between light at night and disrupted sleep is described by the linked sleep-medicine sources; the rule itself is a low-risk environmental change rather than a tested intervention with a defined dose.

Related protocols

• Morning Sunlight in the First 30 Minutes
• No Overhead Light After Sunset
• Morning Sun — No Sunglasses, 10 Min

Sources

• Sleep Foundation — Light and sleep
• Sleep Foundation — Making your room dark
• NIA — Preventing falls at home, room by room

AgeGen never invents studies and never recommends prescription drugs by brand. Biohacks are experiments, not prescriptions — honour the contraindications and talk to a clinician if a condition above applies to you.