Setting several "setValue" at once - optimization

Question

I have some cells (that are non-adjacenet). Each of these has a range name in the form "rLampnn" as below.
ss.getRangeByName("rLamp20").setValue(e.range.getValue());
ss.getRangeByName("rLamp19").setValue(e.range.getValue());
ss.getRangeByName("rLamp18").setValue(e.range.getValue());
I want to put the same value into several of them at once. (Each of them then has a conditional format which changes the cell colour depending on what was entered into them).
Is there a more efficient way (i.e. quicker) of setting the same value into a group of these cells rather than individual calls like above?

Answer 1

If you have many of them you could loop .setValue() using the nn index in the named ranges:
var fName = 'rLamp';
var howManyNamedRanges = 20;
// Assuming the first NamedRange is rLamp0
for (var i=0;i<howManyNamedRanges;i++) {
ss.getRangeByName(fName+i).setValue(e.range.getValue());
}
If the first named ranges is 1 or else you could change it to:
var fName = 'rLamp';
var firstNamedRange = 4;
var lastNamedRange = 20;
// Assuming the first NamedRange is rLamp[n]
for (var i=firstNamedRange;i<=lastNamedRange;i++) {
ss.getRangeByName(fName+i).setValue(e.range.getValue());
}