PAR LED Lamps offer efficacies upwards of 66 LPW.

Comprising 8 W PAR20, 14 W PAR30 and PAR30 Short Neck, 16 W PAR38, and 19 W PAR38 models,

[source: http://news.thomasnet.com/fullstory/PAR-LED-Lamps-offer-efficacies-upwards-of-66-LPW-20014290]