Information for The Rock Orchestra - By Candlelight at New Theatre, Cardiff (Concert). Following a sell-out tour of Europe, The Rock Orchestra by Candlelight returns with an epic, new 90-minute concert, breathing beautifully dark energy into legendary Rock & Metal. In ethereal candlelit settings, this band of 14 classical musicians unleash effortlessly enchanting melodies alongside powerful walls of distortion. Witness the unexpected union of Classical music and Metal.