From IceCap:
If all you are measuring is wattage consumed then a pair of 250-watt incandescent lamps should be better than an IceCap running 285 to 320 watts (depending on the load it senses) through 4 X 4ft fluorescent lamps.
The other problem with this rule of thumb discussion is it discounts the fact that an IceCap ballasts runs at +/- 27KHz frequency and have a soft start to prolong lamp life. I don't know of any other ballast that can be placed over 100 feet from the lamps and does not need a grounding plane behind the lamps to light them. We use a different technology to light lamps.
Andy
|