For more than a decade, the iPhone flashlight was limited to a simple on/off toggle accompanied by four rigid brightness levels accessible by long-pressing a button in Control Centre. With the release of iOS 18, Apple completely transformed the flashlight utility into a sophisticated, multi-axis lighting tool. Taking advantage of the Adaptive True Tone flash and the interactive Dynamic Island, users can now independently adjust both beam width (spread angle) and brightness intensity with fluid touch gestures.
Whether you need a narrow spotlight to illuminate a distant keyhole without waking someone, or a wide, diffuse floodlight to light up an entire campsite or room during a power outage, iOS 18 gives you precise beam shaping. This guide explains which iPhone models support beam width adjustments, how to manipulate the Dynamic Island interface, and how to control lighting across your device.
Supported iPhone Models for Beam Width Adjustment
Controlling beam spread requires Apple’s advanced Adaptive True Tone flash hardware, which features an array of individually addressable LEDs and a focal lens capable of altering optical dispersion. As a result, the dual-axis beam width and brightness interface is available on:
- iPhone 14 Pro and iPhone 14 Pro Max
- iPhone 15, iPhone 15 Plus, iPhone 15 Pro, and iPhone 15 Pro Max
- iPhone 16, iPhone 16 Plus, iPhone 16 Pro, and iPhone 16 Pro Max
Note: Older iPhones running iOS 18 without the Dynamic Island continue to support vertical brightness adjustment via the standard Control Centre interface, but do not possess the multi-LED optical hardware required for physical beam width dispersion.
How to Adjust Beam Width and Brightness on iPhone
When you turn on the flashlight on a supported device running iOS 18, an interactive visual widget immediately expands from the Dynamic Island:
- Turn on your flashlight by tapping the Flashlight icon on the Lock Screen, clicking the Action button (if configured), or tapping the tile in Control Centre.
- Look at the top of your screen; the Dynamic Island will animate into an expanded interactive controller displaying a stylised top-down illustration of light emitting from an LED lens.
- To Adjust Beam Width (Horizontal Swipe):
- Drag your finger left or right across the Dynamic Island control area.
- Swiping to the left concentrates the LED array into a tight, narrow spotlight with longer optical throw.
- Swiping to the right disperses the light into a wide, even floodlight that illuminates your peripheral surroundings.
- To Adjust Brightness Intensity (Vertical Swipe):
- Drag your finger up or down across the control surface.
- Swiping upward increases luminance output smoothly to maximum brightness.
- Swiping downward dims the light to a soft, energy-efficient glow.
- Release your finger when you achieve your desired balance of spread and intensity. iOS provides rich, tactile haptic feedback as you reach minimum and maximum thresholds.
How to Turn Off the Flashlight from Dynamic Island
Once you finish adjusting your beam, you can tap anywhere outside the Dynamic Island or simply swipe upward on the pill to collapse the interface back into its compact status display.
To turn the flashlight off completely:
- Tap the Power/Flashlight symbol in the centre of the expanded Dynamic Island.
- Alternatively, tap the Flashlight button on your Lock Screen.
- If you mapped the flashlight to your Action button on iPhone 15 Pro or iPhone 16 series, press and hold the button once to toggle it off immediately.
Controlling Flashlight Intensity on Non-Dynamic Island iPhones
If you are using an iPhone model without the Dynamic Island (such as an iPhone 13, iPhone 12, or iPhone SE), you can still adjust illumination brightness smoothly:
- Swipe down from the top-right corner of your screen to open Control Centre.
- Touch and hold (long-press) the Flashlight tile.
- An enlarged vertical brightness slider will expand onto the screen.
- Slide your finger up or down along the four segmented tiers to raise or lower light output.
- Tap anywhere outside the slider to lock in your brightness level.
Troubleshooting Flashlight Controls and Heat Throttling
If the flashlight interface refuses to open or dims automatically, consider these operational factors:
- Thermal Safety Throttling: Running the iPhone flash at maximum output produces significant heat. If your device reaches elevated operating temperatures (e.g. on hot summer days or during intensive mobile gaming), iOS automatically dims or temporarily disables the flash until internal temperatures normalize.
- Low Power Mode Battery Throttling: In extreme low battery states (below 5%), iOS may restrict maximum flash luminosity to preserve remaining charge for critical calling functions.
- Camera App Conflicts: If any camera application is running in the background with active video recording standby, it takes priority over the flash hardware. Swipe up to close background camera apps from the app switcher.
The revamped iOS 18 flashlight turns everyday smartphone lighting into a truly versatile, adaptive tool tailored for both focused inspection and wide-area visibility.