If you run more than one camera on your stream, you have probably had that awkward moment of looking into the wrong lens because you could not tell which camera was live. A tally light fixes exactly that: a small indicator that lights up on whichever camera is currently on air. It is a small piece of the multicam puzzle, but it removes a very specific and very common source of on-stream confusion.
What a tally light is
A tally light is a colored indicator — usually red for “live” and sometimes green for “preview” — mounted on or near each camera. It is driven by your switcher or software so it always reflects which source your audience is currently seeing. In professional broadcast, tally systems are standard; in home multicam streaming they range from hardware boxes to free software that lights up a phone or a small USB indicator.
| Tally type | How it works | Best for |
|---|---|---|
| Hardware switcher tally | Built into video switcher | Dedicated multicam rigs |
| Network/software tally | App reads OBS/switcher state | OBS multicam on a budget |
| Phone-as-tally | App shows red/green fullscreen | Cheapest DIY option |
Who actually needs one
A tally light earns its place when you switch between two or more cameras live and you are on camera yourself — a two-camera Just Chatting angle, a cooking overhead plus a face cam, a podcast with multiple hosts, or an IRL setup. Single-camera streamers do not need one; there is only ever one lens to look at. The more cameras and the more you switch, the more a tally saves you.
The multicam context
A tally is one part of a multicam workflow that also includes a switcher (hardware like an ATEM-style unit or software scenes in OBS), synchronized audio, and a way to preview shots. The tally simply closes the loop between “what the switcher chose” and “where the on-camera person should look.”
Cheap ways to get tally
You do not need a broadcast system. Several free or low-cost software tallies read your OBS scene state over the network and light up a phone screen, a smart bulb, or a tiny USB device beside each camera. A spare phone running a tally app and propped by the lens is a genuinely effective zero-hardware solution. Hardware switchers with tally outputs are the premium route for serious rigs.
Placement so you actually see it
A tally light only helps if it sits where your eyes naturally land — right at the lens you are meant to look into, not off to one side. Mount or prop the indicator as close to each camera’s lens as you can, so switching to a camera and looking at its live light means looking straight down the barrel. For a spare phone running a tally app, a small clamp beside the lens works well. Keep the brightness modest so it guides you without glaring into the shot or reflecting in your glasses. Get placement right and the tally becomes an instinct: your gaze follows the red light to the correct lens without conscious thought.
FAQ
Do I need a tally light for a single-camera stream?
No. With one camera there is only one lens to look at, so a tally light adds nothing. It becomes useful specifically when you switch between two or more cameras live and need to know which one is currently on air.
Can I get a tally light without an expensive switcher?
Yes. Free and low-cost software tally solutions read your OBS or switcher state and light up a phone screen, a smart bulb, or a small USB indicator by each camera. A spare phone running a tally app is a popular no-hardware option for home multicam setups.
Bottom line
A tally light tells you which camera is live, and it is worth setting up the moment you run a switched multicam stream with yourself on camera. Single-camera streamers can skip it. You do not need broadcast hardware — a software tally on a spare phone or smart bulb does the job — and it eliminates the wrong-lens fumble that instantly reads as amateur.
