Folk music and indie folk have become more mainstream in recent years, to my surprise. The uplifting and soothing vibrations of this clean and global form of music are something we should all have more of in our lives. Two years ago, Lee Leffler (guitars, keyboards, vocals and lyrics), along with Michael Frackleton (drumming and bass), formed the Boston-based band, Dream of a Man...

Sam Ostler’s new single, “Lights,” then. It unfolds less like a sudden, intrusive glare and more like the slow, determined burn of a really good stage light finally finding its mark after a prolonged blackout. It’s pop, yes, vibrant and undeniably contemporary as advertised – clean lines, clear intentions. Yet, there’s a certain satisfying heft beneath the melodic uplift, a feeling that these notes...