As I wrote in a separate Par30 review, research and a bit of luck led us to Polar-Ray, who led us to Lighting Science. Polar-Ray has been outstanding. As for the bulbs, "spot-on". While a bit broader dimming range would be nice, overall we could not be more pleased with the bulbs. We are, now, only waiting (and hoping) that the bulbs will last as long as the specs say they should.