Disclosed is a non-halogen flame retardant styrene resin composition which comprises a styrene resin and a phosphorous-modified epoxy resin and thus exhibits superior flame retardancy to external candle flame ignition. Under undulating waves, the pendulum, being mounted on the lever arm, sways laterally around an axis of the upstanding post, causing the upstanding post to rotate hence delivering the momentum of the pendulum to drive the power generating mechanism via a transmission shaft and the gear mechanism. The outer layer has a thickness up to about 5 mils sufficient to impart impact and erosion resistance to the thermal barrier coating, and comprises a zirconia-containing ceramic composition having a ca ratio of the zirconia lattice in the range of from about 1.