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Gary
02-13-2009, 05:12 PM
i have a 400w hid light i have mh and hps bulbs for it useing mh just now how much power is my ballast useing ?

John M.
02-13-2009, 05:38 PM
"An average lighting system will increase your electricity cost about $8 to $20 per month. The exact amount depends on the wattage of the system and the number of hours operated. To calculate your cost, multiply the bulb wattage X the number of hours of operation and divide by 1000. This figure is the number of kilowatt-hours of electricity used. (Example: a 400 watt lamp running for 18 hours will use 7.2 kilowatt-hours). Check your power bill for the cost of each kilowatt-hour. Then multiply the number of kilowatt-hours used by the cost of a kilowatt-hour (K/hr) to figure the cost to run your light for that many hours. "

Follow this link to see what else Sunlight has to say about horticulture lighting...

http://www.sunlightsupply.com/hort/faq.aspx#gl_eight

Gary
02-13-2009, 05:55 PM
thanks for the link john

Gary
02-13-2009, 06:00 PM
also just another quick question how can i tell what kind of ballast i have its inbuilt in the light and is very quiet ?

John M.
02-18-2009, 01:27 PM
Gary, Did you purchase it from us? Is it possible to post a picture so that I can take a look at it?

Gary
02-22-2009, 08:54 AM
hi john i did not buy it from you im in the uk its a 400w Industria 3050 grow lamp
http://i253.photobucket.com/albums/hh75/gaz18_2008/industria203050.jpg