Clusters lamps are hugely common right now (even Pottery Barn has a version—and wouldn’t it look so much better without the stupid ceiling brackets?). My personal favorite is still Rody Graumans’ 85 Lamps, designed for Droog in 1993. I don’t have $3800 to buy it, though, so I’m kind of excited to see these recent DIY takes on the concept. They’re a bit like Marco Agnoli’s Sphere Lamps, only way less glitzy and even a bit rustic.
(By the way, Jean Pelle’s candle holders have been on my wishlist for a while now—I especially love the gold-leafed ‘Tod’ style.)
p.s. There’s also a tutorial on Instructables, which, while decidedly less elegant than the other options, has some nice ideas worth checking out if you’re considering making your own version.