LED Brightness Guide
Screen brightness is measured in nits, and getting it wrong in either direction is a problem — too dim and the screen washes out in ambient light, too bright and it can be genuinely uncomfortable to look at indoors. Here's how to think about it.
What does LED screen brightness (nits) actually mean?
A nit is a unit of light output — roughly the brightness of one candle spread over a square metre. The higher the nit rating, the more light the screen can produce, which matters because the screen has to overpower whatever ambient light is already in the room or outdoors, not just be bright in isolation.
How bright a screen do I need for an indoor event?
Indoor venues are generally lit well below daylight levels, so indoor screens don't need anywhere near the brightness of an outdoor unit — they're specified for a controlled, dimmer environment. What matters more indoors is whether the room has large windows or bright house lighting near the screen, since that ambient light is what the screen needs to compete against.
How bright a screen do I need for outdoors or daylight?
Direct sunlight is vastly brighter than any indoor lighting, so outdoor screens need to run at significantly higher output to stay visible during the day. This is one of the main reasons outdoor screens are a different product from indoor ones, not just an indoor screen placed outside — see our Indoor vs Outdoor LED Screen Guide.
Can brightness be adjusted, or is it fixed?
Most LED screens can have their brightness turned down from their maximum output, which is useful for an evening event or a darker room where full brightness would be uncomfortably harsh. What they generally can't do is exceed their maximum rated brightness, so it's the ceiling that matters most when specifying a screen for a bright environment.
Should brightness be different for a daytime portion versus an evening portion of the same event?
Often yes — a wedding or launch that runs from an afternoon outdoor reception into an evening indoor reception benefits from the technician adjusting brightness as the light changes, rather than leaving it fixed at one setting for the whole day. This is something we plan for and manage on site rather than leaving to a single static setting.
Does brightness affect how the screen looks on camera?
Yes — a screen that's too bright for the room can appear blown out or overexposed on camera even if it looks fine to the naked eye, and one that's too dim can look flat or grey on film. If your event is being filmed, it's worth flagging that so brightness can be balanced with the camera setup, not just the room.
Can two screens with the same nit rating actually look different in brightness?
Yes, in practice — factors like the panel's age, calibration and how evenly the brightness is spread across the whole screen can all affect how bright it actually looks, even with an identical nit rating on paper. This is part of why we calibrate and check screens before an event rather than relying on the spec sheet alone.
Does higher brightness use more power?
Yes, running a screen at higher brightness draws more power than running it dimmer, which is one of several reasons power requirements are calculated for your specific screen and settings rather than given as a single generic figure — see our Power Requirements Guide.
Does higher brightness cost more?
Generally yes — higher-brightness panels, particularly outdoor-rated ones, tend to sit at the more expensive end of the range, partly because of the components involved and partly because they're usually paired with the other outdoor-specific features like weatherproofing.
What happens if my screen isn't bright enough?
The image looks washed out and faded, particularly noticeable near windows or under stage lighting, and colours lose their punch. It's not a fault with the screen itself — it just means the wrong brightness level was specified for the environment, which is exactly what we check for when quoting.