Lighting

					1			2						3
			4									5
			6			7		8
	9
															10
11																				12
																	13
										14		15
	16
						17
	18
																		19
															20
21
						22
																23

Across 2. Filaments are made from this metal 4. Takes into account deterioration of reflecting surface and light output 7. Light is this type of radiation 9. Type of starter used in flourescent lamp circuits 11. Radiation given off by mercury lamps 15. These types of lamps do not rely on the heating of a filament to produce light 18. Light consisting entirely of one wavelength 20. Gas contained in some types of filament lamps 21. Name of filament in discharge lamps 22. Type of square law 23. Flow of light radiated fron a single source

Down 1. Device which splits light into seven colours 3. Lamp output compared to energy input 5. The ability of the lamp to show colours faithfully 6. Type of discharge lamp 8. Name given to the outer glass vessel of lamp 10. Type of vapour contained in flourescent lamps 12. Lamp will not restrike if mains fails until this has reduced through cooling 13. Measurement of power 14. Device used in discharge lamp circuits to improve power factor 16. Measure of the brightness of the light reflected from a surface 17. Provides the starting voltage and current control 19. Type of lamp often used for street lighting

The look has changed! Some of the puzzles that people list for the public get indexed by the search engines (like Google). Some people find those puzzles and cannot figure out how to make a puzzle of their own. So this page now has the navigation sidebar.

Use the "Printable HTML" button to get a clean page, in either HTML or PDF, that you can use your browser's print button to print. This page won't have buttons or ads, just your puzzle. The PDF format allows the web site to know how large a printer page is, and the fonts are scaled to fill the page. The PDF takes awhile to generate. Don't panic!