Can you pull the knob off? This should be a flat spot or something to tell you where the selector switch should line up with the line on the knob. Then you can just put the knob back on where it should be and see where the line is.I got this selectable ballast, and selector is broken, I can switch it, but I don't know what selection I got. The bulk will light up on all selections. (400w radium) I want to select it at 400w and keep it there, is there a way to find out what selections I'm in. Like checking output of while it's on..... or something like that. I have multi meter I can use on it. And I can get Amp meter from work if necessary.
Yeah I though a out using this way, I have a kill a wat metter somewhere in the house.
The line is only on a know, there is nothing to indicate where line is behind the knob
New what? Ballast or knob? Ballast is $165
Yeah that’s probably right with the ballast factor added to the wattage. Socket voltage for a 400w MH should be in the range of 250v-320v if you do want to check the socket voltage but thinking your apex is proof enough in that measurement.I don't know why I didn't think of using apex as a Metter before, is 437w sounds right to radium bulbs on icecap ballast? I say 437 and not 443 because apex draws 7 watt on it own. Actually it hass to be correct one, couse if i move one up it will show 470w. And if i move one back is will show 300w
