Related Clues:

• Source of light; type of printer
• What leads in lens and surgical eye repairs
• Failure needs a second type of surgery
• No live wire, we hear, in this scientific device
• At start of series, left a beamer
• Intense light generator
• Intense light device
• Scientific device - one that conserves energy, we hear
• Surgical device made by modern light industry
• Scientific apparatus - one that rarely works, we hear
• Laboratory apparatus some expert researchers initially put together
• Powerful light source seen around in theatres always
• Coherent light-beam
• Electronic device — timeless thing that keeps going
• Light beam source