A t its most fundamental, computer science is about the search for better algorithms - more efficient ways for computers to do things like sort data or filter noise out of digital signals.
I've tried the latter approach in Listing 6. (Note that filter takes a (t) : Booleanmethod, meaning it takes a single parameter of whatever type the array holds and returns a Boolean.)
Based on T type filter, the new ballast can achieve a wide dimming range with a very narrow frequency variation range, and it can operate with low lamp current crest factor.