Complex sentence: For centuries, sailing ships used Deck Prisms to provide a safe source of natural sunlight to illuminate areas below decks Before electricity, light below a vessel's deck was provided by candles, oil and kerosene lamps-all dangerous aboard a wooden ship.
Split into simpler sentences: For centuries, sailing ships used Deck Prisms to provide a safe source of natural sunlight to illuminate areas below decks Before electricity, light below a vessel's deck was limited. Light below a vessel's deck was provided by candles, oil and kerosene lamps-all dangerous aboard a wooden ship.