Daddario EXL150H

Most people have not heard of Nashville tuning, where lower strings are raised an octave, giving a very chimey sound. This is used a lot as a contrasting second guitar to bring an extra dimension into an arrangement. These strings work as well as you would hope in duplicating this effect, but there is a catch:
The lower strings are very small compared to the typical grooves cut into your guitar's nut, so you may find it necessary to make temporary fix by sticking something under the string in the slot to stop it being too low and buzzing, or if you plan to keep the guitar in this tuning, by getting a new nut cut

I bought these strings to add a different texture to recording. I use them on an Ibanez FR (you want to use a fixed bridge guitar with strange gauges!), and they provide a wonderfully lush, haunting sound. Doubled with a regularly tuned guitar, they sound like a 12-string, but better because no 2 performances are exactly the same, and the minute timing differences make the guitar sound come alive.

Not a string set for playing lead on (the weird octave leap would take too much getting used to) and I'd probably not use them live, but for recording a guitar strung up with these is a great addition. Of course they're D'Addario, so they're consistent and long-lasting.