A consistent bearded dragon lighting schedule is the foundation of long-term health. Light cycles control digestion, activity, sleep, and even breeding behavior. Wild bearded dragons in central Australia experience about 14 hours of daylight in summer and 10 hours in winter — replicating this seasonal shift indoors keeps your dragon’s circadian rhythm aligned with their biology.
This page gives you the exact on/off times for every season, plus three sample schedules (juvenile / adult / brumation prep) and answers to the most common lighting-schedule questions.
Why a Lighting Schedule Matters
Bearded dragons don’t just need light — they need predictable, timed light. A consistent schedule drives three biological systems:
- Circadian rhythm: regulates sleep, hormone release (melatonin/cortisol), and immune function. Inconsistent light cycles weaken immune response over time.
- Vitamin D3 synthesis: UVB exposure triggers D3 production in the skin. The body stores D3 for ~24 hours, so daily UVB is essential.
- Thermoregulation and digestion: dragons need 4–6 hours of basking-zone warmth after eating to digest a meal. Erratic basking temperatures = chronic indigestion.
Use a $10 mechanical outlet timer for the basking lamp and a separate timer for the UVB tube — this removes human error from the equation and prevents “I forgot to turn off the UVB” problems.
Bearded Dragon Lighting Schedule by Season
| Season | Lights ON (UVB + heat) | Lights OFF (full dark) | Total daylight |
|---|---|---|---|
| Summer | 7:00 AM | 9:00 PM | 14 hours |
| Spring / Fall | 8:00 AM | 8:00 PM | 12 hours |
| Winter | 9:00 AM | 7:00 PM | 10 hours |
Adjust these times by ±1 hour based on your local sunrise/sunset — use a sunrise/sunset calculator for your latitude. The goal is to match what dragons experience in the Australian outback (similar latitude to Texas / southern California).
Basking Lamp vs UVB — Same Schedule, Different Bulbs
Both lights should turn on and off together. There is no benefit to running the basking lamp without UVB, or vice versa. Putting them on separate timers that drift out of sync confuses the dragon’s circadian system.
Exception: in winter, if your room gets below 65 °F (18 °C) at night, add a ceramic heat emitter (CHE) on a thermostat-only night timer. CHEs produce heat without light, so they don’t disturb the dark cycle.
Sample Schedules by Age
Juvenile Bearded Dragons (0–12 months)
- Lights ON: 7:00 AM (or local sunrise in summer)
- Lights OFF: 9:00 PM
- Basking temperature: 105–110 °F (40–43 °C)
- Cool side: 75–85 °F (24–29 °C)
- Total daylight: 14 hours
Juveniles need the most heat and the longest day length to support rapid growth. Don’t shorten their schedule in winter — they’re still building bone mass and need consistent UVB.
Adult Bearded Dragons (12+ months)
- Lights ON: 8:00 AM
- Lights OFF: 8:00 PM
- Basking temperature: 95–105 °F (35–40 °C)
- Cool side: 75–80 °F (24–27 °C)
- Total daylight: 12 hours
Adults do well on the standard 12/12 cycle year-round, with mild seasonal variation (±1 hour) to mimic natural conditions.
Brumation Prep Schedule (November–February)
- Gradually shorten day length by 30 minutes every 2 weeks over 6 weeks, ending at 8 hours total daylight.
- Lower basking temperature to 85–90 °F (29–32 °C) over the same period.
- Continue offering food for the first 2–3 weeks of shortened schedule; many dragons gradually stop eating on their own.
- Maintain hydration: offer fresh water daily even if your dragon isn’t eating.
Brumation is a natural winter slow-down — see our complete brumation guide for the full protocol.
Timer Setup: What to Buy and How to Wire It
The simplest setup uses two mechanical or digital outlet timers:
- Basking lamp timer: controls the dimming thermostat power (the dimming thermostat itself controls the basking temperature based on the probe).
- UVB tube timer: turns the UVB tube on/off at the scheduled times.
For $15–$25 total (two basic timers from any hardware store), you eliminate the most common cause of bearded dragon health problems — inconsistent light cycles.
Recommended timers: any digital 7-day programmable timer with 1-minute resolution works. Mechanical spring-wound timers are cheaper but drift ~5 minutes per week and don’t allow 7-day programming.
Schedule Troubleshooting
My dragon is “lazy” and won’t come out in the morning. Your lights may be coming on too late. Try shifting the ON time 30 minutes earlier for one week. Dragons are crepuscular — most active right after sunrise and just before sunset.
My dragon glass-surfs at night. Usually means the room is too dark and they feel unsafe. Add a low-wattage moonlight bulb (ceramic, no red) on a separate dimming thermostat for nighttime visibility. Avoid red/blue “night” bulbs — they disrupt the dark cycle.
My dragon brumated even though I keep the schedule constant. Some dragons brumate on internal seasonal cues regardless of artificial light. If your dragon sleeps for >2 weeks, stops eating, and hides constantly, this is brumation — not illness. Confirm with a vet if concerned.
Power outage — what now? A single 4-hour outage is harmless. Longer outages: wrap the tank in blankets to retain heat, place a warm (not hot) water bottle inside, and resume the schedule once power returns. Don’t add candles or unvented heat sources — fire risk.
Lighting Schedule FAQ — 2026 Update
Do bearded dragons need UV light at night?
No. Bearded dragons need complete darkness at night to produce melatonin and sleep properly. Any visible light source (red bulb, blue bulb, “moonlight” bulb) disrupts their circadian rhythm and can cause chronic stress over months. If your tank gets below 65 °F (18 °C) at night, use a ceramic heat emitter (CHE) instead — it produces heat with zero visible light. Pair the CHE with a thermostat set 5–10 °F below your daytime basking temperature.
How long should UVB be on per day for a bearded dragon?
UVB should be on for 10–14 hours per day, matching your daylight schedule. T5 HO UVB tubes (10.0 strength or Arcadia 12%) at 12–18 inches from the basking spot provide adequate D3 synthesis in that timeframe. The UVB tube should be replaced every 12 months — the visible light looks fine but UVB output drops ~50% after 6–9 months and becomes negligible by month 12. Mark the install date on the tube with a permanent marker.
Should I use a timer for my bearded dragon’s lights?
Yes, always. Manual on/off cycling is the #1 cause of bearded dragon stress in captivity — humans forget, sleep in, or change routines unpredictably. A $10–$15 outlet timer guarantees a consistent schedule year-round, including weekends and vacations. Use two separate timers: one for the basking lamp (which goes through the dimming thermostat) and one for the UVB tube. They should be set to the same ON/OFF times so the two lights stay synchronized.
What time should I turn on my bearded dragon’s lights?
Turn lights on at 7:00 AM in summer, 8:00 AM in spring/fall, and 9:00 AM in winter. These times roughly match the natural daylight cycle in the central Australian outback (where bearded dragons originate). For the most accurate schedule for your latitude, check a sunrise/sunset calculator and aim for ±30 minutes of your local sunrise. Avoid turning lights on before 6 AM or after 10 AM — extreme early/late onsets confuse the dragon’s internal clock.
Can I leave the UVB light on 24/7?
No. Continuous UVB prevents melatonin production, disrupts sleep, and stresses the dragon’s immune system over weeks to months. UVB must turn off for 10–14 hours per day to allow normal dark-cycle hormone release. Basking lamps also need full darkness at night. The only safe 24/7 light is a ceramic heat emitter on a thermostat — but only if your room actually drops below 65 °F at night; otherwise skip it entirely.
Do bearded dragons need a day/night cycle in winter?
Yes, but the cycle should shorten. Wild dragons experience ~10 hours of daylight in winter. In captivity, replicating this shortening (9:00 AM ON / 7:00 PM OFF for 10 total hours) triggers natural brumation behavior in some adults. Babies and juveniles should be kept on the longer 12–14 hour cycle year-round to support growth — don’t shorten their light cycle until they’re at least 18 months old. If you want to encourage brumation for breeding purposes, shorten gradually (30 min/week over 6 weeks).
Should I use an automatic dimming thermostat with my basking lamp?
Strongly recommended. A dimming thermostat (e.g., Zoo Med ReptiTemp, Exo Terra Thermostat) reads the basking-zone temperature via a probe and adjusts the bulb’s brightness to maintain a set point (typically 105 °F for adults). Without a thermostat, a 75 W bulb can push the basking zone to 130 °F+ within 30 minutes, risking burns. The thermostat is the most important $30–$50 you’ll spend on the setup. Always plug the basking lamp through the thermostat, not directly into the timer.