The colors include:Īs a player, if you’re looking for certain denominations, getting to know these color codings can help you eyeball the casino floor without having to get close to a given machine to know its denomination starting point. The upper half of a candle is always white, but the lower half will have a color based on a machine’s lowest denomination.

Both lights blinking slowly: The player has hit a jackpot and is waiting to get paid!Ĭandles can send other messages too, like when a machine is low or out of paper, and for coin machines when it needs a coin refill or is full.

Both lights blinking rapidly: The machine has been taken out of service.

You’ll see this a lot when the cash boxes are swapped out overnight.

Lower light blinking: A machine’s door has recently been opened.

That’s why attendants will come over and ask you if you need help when that light is on and solid – that’s their bat signal to come check. Solid top light: Someone hit the service button on the machine.Which light(s) are activated (whether solid or blinking at some pace) can tell a slot attendant at a glance what’s going on with a machine. The candle has two segments to it, a top and bottom light. While us players will be looking down at the games and figuring out what we want to play, the attendants will regularly look up and scan for those candles, which ones are lit up, and what signals they are sending. Since there is a standard for how a candle’s lights operates, staff is still trained to know to look for those visual signals. Despite that, many casino floor staff still respond when they see certain signals from them. If you’ve ever noticed the lights atop a slot machine, and seen them blinking, you’ve just noticed the candle, one of the more steady slot machine features across its modern history.Ī candle is a bit outmoded theoretically thanks to modern advances in technology, and nowadays at many casinos will get an alert on a smartphone as to what and where something is needed.

Double flashing light slot machine