This needs a 100V capacitor. 6.3V ceramic caps are easy to source, but not higher voltage devices. Multilayer ceramic capacitors for high voltages are still quite expensive.[1] Not available in surface mount, either.
Energy stored is voltage x capacitance, and capacitor size and cost scales according. You have to store enough energy to light the bulb for half a power line cycle in something.
If you used 3-phase power to light bulbs, no need for energy storage. 3-phase is always on; you just need a switching regulator to smooth out the ripple. Some large arena lights work that way. Not worth the trouble at home scale.
Energy stored is voltage x capacitance, and capacitor size and cost scales according. You have to store enough energy to light the bulb for half a power line cycle in something.
If you used 3-phase power to light bulbs, no need for energy storage. 3-phase is always on; you just need a switching regulator to smooth out the ripple. Some large arena lights work that way. Not worth the trouble at home scale.
[1] http://www.chemi-con.co.jp/e/catalog/pdf/ce-e/ce-sepa-e/ce-n...