[tlhIngan Hol] law' and 'Iq

We know we can say {'ul law'} for "a great amount of electricity"; but can we say too {'ul 'Iq} for "too much electricity" ? Other than that, is there any other considerable difference between {law'} and {'Iq} ? That is a difference besides the level of "how much", expressed by each. For example, is the {'Iq} only to be used in cases where we want to express something negative ? For example {jagh 'Iq}, or can it be used too in order to refer to something positive, for example {batlh 'Iq} ? qunnoq