The reason I'm using LEDprodvarname is because that's what the Dimmable variable is using and they are both built from the same product variables table. Why then, if Dimmable uses LEDprodvarname:
$ATC_itemDimmable = "".$row_rsDIMMLOOKUP['LEDprodvarname'] ."";// column binding
...should the sensor option use LEDvarname?
The two variables and the two drop down's should use exactly the same method, should they not?