The Apocalypse-Class was created as an all-purpose cruiser, fitting the roles of Heavy Hitter, Long Range, Attack, Defense, and Assault. The finished product is too large and expensive to be used exclusively, as was planned, but it compliments the larger fleets, such as the Home Fleet.
The engine would probably be brighter, but cool effect anyway. I did this by shooting a laser into into the engine.
How the engine was built.
Known Apocalypse-class ships: Apocalypse One