Scared of the dark: what the evidence says and what to try
It is bedtime, the light goes off, and a small voice says it is too dark.
The NHS says it is common for preschool-age children to develop specific fears, the dark among them, and that these “usually go away gradually on their own” (NHS, Anxiety in children, reviewed 5 August 2026). Tonight, ask what scares your child and look at the room from their bed.
The honest wrinkle: nothing we read counted children under three, the ages and percentages quoted online disagree, and we found no trial of a night light, so we treat a light as a comfort choice, not a treatment.
Is it really fear of the dark?
Start by listening: the same NHS page says to listen carefully and try not to “make assumptions or dismiss their worries”.
Check the room from their side. The Royal Stoke paediatric sleep booklet (Staffordshire Children’s Hospital at Royal Stoke, hosted by Humber NHS) says: “View your child’s room from their perspective. Are there scary shadows, noises etc?”
A child who screams asleep and remembers nothing may be having a night terror rather than a fear, a different problem.
How common, and from what age?
The sources do not agree on one age. NHS Healthier Together (no review date shown) says many toddlers aged 1 to 2 have fears or bad dreams and calls this “normal at this age”: guidance, not a measurement, and about fears in general.
Anything more precise is opinion. UK sleep consultancy pages we read say it starts around 2 or 2 and a half, and US clinical pages say 3 to 6, 3 to 5, or a peak at 7 to 9, with no source given for the age.
The measured studies do not settle it. Dutch interviews with 176 children aged 4 to 12 (Muris and colleagues, 2001) found night-time fears more frequent at 7 to 9 than at 4 to 6. A British parent survey of 5 to 16-year-olds (Meltzer and colleagues, 2009) linked fear of the dark more strongly with younger children. The youngest children in the studies we read were 4, or 3 in one treatment trial, so nothing we read measures under-3s.
The percentages differ. British parents reported fear of the dark in 6.3% of 5 to 16-year-olds; 73.3% of the Dutch 4 to 12-year-olds said they had some night-time fear. The ages, the person answering and the question all differ, so they cannot be compared. The Dutch study also found parents markedly underestimated what their children reported. Our reading: it is common, and you may not see all of it.
What has trial support, and what has none
The trials we found tested playful programmes, not lights. A 2022 Hungarian trial of a five-week, parent-delivered game programme (73 children aged 3 to 8) and a 2026 trial of a book with games (38 children aged 4 to 8) both reported larger falls in night-time fears than their waiting groups.
Treat them with care: they are small, mostly waiting-list controlled, and show what happened in those groups, not what will happen for your child. In the 2022 paper, families were placed in groups by where they lived, not by chance, and its third author wrote the book the programme follows; she also co-wrote a nine-child study of it in 2015, so neither is independent of the programme. The 2026 trial was registered retrospectively, after it had begun. A 2007 review of 29 older studies found most reported a rapid fall in fears after a few sessions, but called for a modern randomised trial.
We found no trial of a night light for a child’s fear of the dark (PubMed title and abstract search, 19 September 2026). That does not show that lights fail, only that we could not find the test.
Should you reassure them? Where the advice disagrees
The NHS says not to dismiss worries. A Medway Community Healthcare parent leaflet (a provider working on behalf of the NHS in Kent; content undated) also says to be understanding and encourage a child to talk about their fears, but warns that a child given lots of attention and reassurance, or soothing while the light stays on, is “directly rewarded for their fear”.
We found no trial of either stance. Our reading, and only that: you can follow both. Acknowledge the fear in a sentence, say calmly what happens next, and keep extra attention and lingering short.
A light for now: which one, and which not
The NHS sleep tips for under-5s say: “If your child is afraid of the dark, consider using a nightlight or leaving a landing light on” (NHS, Sleep and young children). The page gives no reason or duration for that line, and its only brightness advice is a separate tip: “Leave a dim light on if necessary.” Its next review was due 31 March 2026, but it is still live. The Healthier Together rule to “Turn lights off or keep them very dim” sits under 3 to 5 only and is a general bedroom rule, not advice about fear. Our reading: with no trial we could find, a light is a comfort choice.
Our guide to brightness and colour covers the lab studies of light and the sleep hormone melatonin (not fear). “Warm” varies from box to box, so where a maker gives a kelvin number (K, the scale for a light’s colour), go by that (our warm and cool white guide explains).
| If your child... | Look for (our judgement) |
|---|---|
| needs a light to settle | A dim, steady light. |
| can manage once the light goes off | A light with a timer. |
| needs the way to the bathroom lit | A landing light left on, as the NHS suggests. A motion light suits a landing, not a bedroom (motion and steady lights compared). |
| wakes frightened early, or is unsure it is morning | Check for light leaks first (our 5am guide); an ok-to-wake clock can answer “is it morning yet?” once they can read the cue. |
For the first row, the current listing describes Anseria as having three warm brightness levels and USB-C charging. For the second, it describes Elephia as a warm LED with three brightness levels by touch and a 30-minute timer to use after settling down.
Our reading: a timer suits a child who stays asleep once settled; if yours wakes frightened, the light may already be off. We would skip colour-cycling lights; steady is simpler. If you are wondering about a star or galaxy projector instead, our guide to baby projectors and night lights compares the two. For what to look for in the light itself at toddler age, see our toddler night light guide.
Both are bedside lights, not toys. The listings say an adult should supervise setup and use with young children, with the light on a stable surface outside the cot or bed, never under bedding, and the cable and power source away from the sleeping area. Follow the user guide. We make no claim that either eases fear or improves sleep.
When to ask for help
The NHS anxiety page says anxiety can start to cause problems when it is “very strong, or getting worse, and does not go away”, or stops a child doing things they enjoy. If it is severe, persists and interferes with everyday life, a GP is a good place to start; the NHS sleep page suggests talking to a health visitor for further advice. The NHS lists Young Minds’ free parent helpline, 0808 802 5544: Monday to Friday, 9.30am to 4pm. These are general anxiety rules; we found none written for fear of the dark.
What to try tonight
Ask what the scary part is and look at the room from their bed. By day, play in the bedroom; the Royal Stoke booklet suggests treasure hunts, though that is practitioner advice, not a trial result. If you decide you want a light, our children’s collection is one place to look; if not, there is nothing you need to buy.
References
- NHS. Anxiety in children. Last reviewed 5 August 2026, next review due 5 August 2029. Supports: preschool-age fears including the dark and that they usually go away; listen and do not dismiss worries; when anxiety is a problem; GP as a starting point; the Young Minds parent helpline details.
- NHS. Sleep and young children. Last reviewed 31 March 2023, next review due 31 March 2026 (passed; page still live). Supports: the nightlight and landing-light line for under-5s, “Leave a dim light on if necessary”, health visitor.
- NHS Healthier Together. Healthy Sleep, child under 5 years. No review date shown on the page. Supports: the 1 to 2 years line on fears and bad dreams; the 3 to 5 years bedroom lighting rule.
- Medway Community Healthcare (NHS provider). Childhood fears: parent leaflet (ref MCH 631; content undated, PDF created July 2019 per its metadata, file last modified 14 April 2025). Supports: the warning that attention and reassurance can reward fear; encouraging a child to talk about fears.
- Staffordshire Children’s Hospital at Royal Stoke, hosted by Humber NHS Connect. Paediatric Sleep: Helping your child get a good night’s sleep (PDF, file dated 25 October 2024; the file name is not the booklet’s title). Supports: viewing the room from the child’s perspective; daytime play and treasure hunts in the bedroom.
- Meltzer H, Vostanis P, Dogra N, et al. Children’s specific fears. Child Care Health Dev 2009;35(6):781-9. Supports: the British parent survey, 6.3% for the dark, association with younger children (abstract read).
- Muris P, Merckelbach H, Ollendick TH, King NJ, Bogie N. Children’s nighttime fears: parent-child ratings of frequency, content, origins, coping behaviors and severity. Behav Res Ther 2001;39(1):13-28. Supports: 176 children aged 4 to 12, 73.3%, more frequent at 7 to 9 than 4 to 6, parents’ underestimation (abstract read; the abstract does not name the country, and the first author is at Maastricht University).
- Kopcsó K, Láng A, Coffman MF. Reducing the nighttime fears of young children through a brief parent-delivered treatment: effectiveness of the Hungarian version of Uncle Lightfoot. Child Psychiatry Hum Dev 2022;53(2):256-267. Full text: PMC8924102. Supports: 73 children aged 3 to 8, five-week programme, waitlist group, group assignment by place of residence, and the conflict-of-interest statement that the third author wrote the assessed book (full text read).
- Orgilés M, Belzunegui-Pastor A, Amorós-Reche V, Espada JP. Efficacy of bibliotherapy combined with games to reduce fear of the dark in young children: results from a clinical trial. Eur J Pediatr 2026;185(5). Supports: 38 children aged 4 to 8, waiting-list control, retrospective registration (abstract read).
- Lewis KM, Amatya K, Coffman MF, Ollendick TH. Treating nighttime fears in young children with bibliotherapy: evaluating anxiety symptoms and monitoring behavior change. J Anxiety Disord 2015;30:103-12. Supports: the nine-child study of the same programme and the shared co-author (abstract read).
- Gordon J, King NJ, Gullone E, Muris P, Ollendick TH. Treatment of children’s nighttime fears: the need for a modern randomised controlled trial. Clin Psychol Rev 2007;27(1):98-113. Supports: the review of 29 studies and the call for a modern randomised trial (abstract read).
Our search for a night light trial: PubMed, title and abstract, 19 September 2026, terms combining night light and child with fear or dark, and “fear of the dark” with child. Other databases were not searched.