Amonra said:cratz2: thanks for the link. but it seems that McGizmo's S bin Lux1 is not really an S bin as at 350mA it is drawing 1.155 W and giving 51 Lumens i.e. 44 Lumens @ 1W = R bin. i am therefore guessing that a real S bin Lux 1 would outperform a Q bin Lux 3