CANDLE POWER / LUMENS

[centaur21]

I am using Killark lighting and am to layout some lighting. This is my first time doing anything with lighting, therefore I need you guys help.

I have a 175W mercury vapor light with globe and dome refractor. This particular light can be purchased from ranges of 70-250watts. It also has a 14000 lumen spec. Now in the catalog, it tells me that for the 175W MV light, multiply by 0.56, which I'm guessing I multiply 0.56 to the 14000 lumens and from there I find CP from the chart. Now, is there a better way than trying to guess at what the CP is going to be based on the lumen x 0.56 product and trying to intersect the angle of light on a contour chart or is there a more precise, exact CP that I can get? Any info you guys could provide would be greatly appreciated even though it's beyond my questioning.

Thanks.

 

[rbulsara]

Take time and refer to IES or IESNA (Illuminating Engineering Society of North America) publication for Hand Book for lighting desing Reference and Application.

 

[centaur21]

Can I look at this info for free b/c I need this info soon?

 

[MadMango]

Maybe this site will help.
HyperPhysics

[green]"Art without engineering is dreaming; Engineering without art is calculating."[/green]
Steven K. Roberts, Technomad
Have you read faq731-376 to make the best use of Eng-Tips Forums?

 

[rbulsara]

If you are working at a decent company, they should have it. NO its not free.

You can try websites of someligting company or their free publications but there is no substitute for proper learning. If in too much hurry, have the vendor do the calcs for you.

 

[VEBill]

Virtually everything you'd ever need to know is on the www.

http://www.google.com/search?q=Candlepower+Lumens