Can't you picture it?
There isn't a schematic but it's so simple it doesn't need one, the description shloud be good enough. Alright for nubesake I'll draw one so everyone's clear on what he means.
Look, notice how the bulb is in series with the bridge so it limits the current and the voltage across it is lower than 230V.
However, I do agree this isn't a good way of doing this, it dangerious and wasteful, you're better of using a transformer, rectifier and LM317 constant current source.