Related Clues:

• Bulb rating
• Lightbulb unit
• Scottish engineer with a unit named after him
• Electrical power unit
• Coiner of the term ''horsepower''
• Horsepower fraction
• Word on bulbs
• Light bulb measure
• See 17 Across
• Solar panel unit
• Bulb measure
• A light amount?
• One joule/second
• Inventor
• Eponymous Scottish inventor