We couple this fixture with ST19 bulbs and it offers a great effect.  The parts diagram didn't quite match what physically arrived in the box.  We scrounged a couple spare parts off old fixtures and got it to work.  We ordered 6 and they all came with the same parts...so, it wasn't just a fluke on the missing parts.  I would purchase these again.  3 stars due to missing parts, otherwise, an easy 4.