Italian to English Tech/Engineering Electronics / Elect Eng hydromassage tubs

first of all, forgive me for putting in two terms, which is not usually allowed, but it is the collocations I am looking for in this instruction booklet.

I can't seem to make anything sound natural, and I hate doing stilted translations.

The client makes hot tubs, and has just created one where there are two buttons.
- Each button can be off, flashing or on - i.e. show a solid light (even that sounds stilted doesn't it?)
- The flashing can be faster or slower (frequenza)
- The light can be brighter or dimmer (intensità).

But when I come to translate a phrase like "Il pannello torna allo stato di tasto A spento e tasto B fisso a bassa intensità." or "Il raggiungimento di tale limite (fissato pari a 5 cicli di idromassaggio) viene indicato dalla stessa vasca, mediante uno specifico lampeggio contemporaneo dei 2 tasti A e B (alta intensità bassa frequenza)."

OK, so the Italian is not going to win any prizes for elegance, but unfortunately, whatever I try to write always sounds as if I'd had to rush one of my first technical translation exercises at translation college, with a (hypothetical) hangover to boot.

So is there a single term for each state that can be used in the circumstances which would sound better than my poor attempts, or can you point me towards a machine which has the same light functions (there must be millions of them, but I've been looking for them in vain for ages)

Many tanks (good Freudian typo there!)

Anthony