If your phone alarm makes you wake up startled, groggy and already annoyed, a sunrise alarm clock is worth considering. Instead of a sudden beep in a dark room, it gradually brightens over 20 to 30 minutes before your set time, mimicking a natural dawn so your body begins to wake before the sound even starts. Many people find they feel less groggy and more alert, especially in winter when mornings are dark. But not all sunrise clocks are equal: brightness, colour temperature, sound quality and extra features vary widely, and the cheapest models often disappoint.

Brightness is measured in lux, and a good sunrise clock should reach at least 200 to 300 lux at a comfortable bedside distance, which is bright enough to signal morning to your brain without feeling like a spotlight. Colour matters too: the best models start with a soft warm red, shift through orange, and end in a bright warm yellow-white, copying a real sunrise. Avoid clocks that jump straight to harsh white light, because that defeats the purpose of a gradual wake. If you share a room, check whether the maximum brightness can be capped, or whether the light can be angled away from your partner's side of the bed.

Most good sunrise clocks also offer a sunset wind-down mode, dimming gradually while you read or fall asleep, which is a genuinely useful bonus if you struggle to switch off. For sound, look for a choice of natural sounds, gentle music or FM radio, plus a backup beep that only kicks in if you sleep through the light, and check that volume is adjustable in small steps. Useful extras include a USB charging port, a dimmable clock display for night-time, and app control, but be wary of models that require an app for basic functions. A simple physical button for snooze, ideally a large one you can find half-asleep, matters more than a flashy app.

Place the clock on your bedside table, about an arm's length from your head and slightly to the side, so the light reaches your closed eyelids without shining directly into your eyes. Larger dome-style lamps spread light more evenly across a room, while compact clock-style models suit small bedside tables and travel. Sunrise clocks suit shift workers, students with early classes, anyone with winter grogginess, and light sleepers who hate alarms, but they are not a medical treatment for sleep disorders. If you regularly cannot wake at all, or you suspect a sleep condition, speak to a clinician rather than relying on a lamp alone.

Avoid very cheap models with only three brightness steps, no sunset mode and a tinny speaker, because they often feel like a bedside lamp with an alarm bolted on. Mid-range models from established sleep brands usually offer the best balance of brightness range, sound choice and build quality, while premium models add app control, multiple alarms for different days, and smart-home integration. Check the warranty and return policy before buying, because sunrise waking is personal: what feels gentle to one person can feel too dim or too bright to another, and a two-week trial at home tells you more than any review.

Before you check out, run through this checklist: maximum brightness of at least 200 lux, a gradual 20 to 30 minute sunrise, warm-to-white colour progression, at least three pleasant wake sounds plus a backup alarm, a dimmable display, a sunset mode, and a snooze button you can find in the dark. If a model ticks those boxes and fits your bedside table, it is likely a good buy. If it misses brightness or sound quality, keep looking, because those are the two features you will notice every single morning.

A good sunrise alarm clock will not fix a bad sleep routine on its own, but paired with a consistent bedtime and a phone left outside the bedroom, it can make mornings noticeably kinder. Choose brightness and sound first, extras second, and give yourself a week to adjust before judging it.