Reducing voltage/current of AC circuit with makeshift bi-polar capacitor
Capacitors in series need balancing resistors to ensure that one capacitor doesn't get over-supplied with voltage. This problem is normally one that is associated with DC circuits and series capacitors used in power supplies but, can also be seen on AC supplies.

A problem I see is that most electrolytic capacitors have a wide tolerance range and this will inevitably mean that one (or some) of the capacitors (that have the lowest capacitance value) will receive an unequal share of the voltage and possibly cause a breakdown.

Another problem is that relying on an electrolytic to turn into a diode when reverse polarized is a bit hit and miss. So, if you choose capacitors that are fairly well balanced in value and maybe consider using reverse diodes across them en bloc it might be OK.

Alternatively, get a lamp that is low voltage and wire it in series with the element in order to drop the voltage to the element.