... 7*4*1W,7LEDS IN SERIES, 4 paralleling),E40 BASE,SCREW.COST:(BELOW 100SETS): 25.5USD,FOBSHANGHAI.DRIVER ... 7 in series ,4 parallel connection ; THEN CONNECT TO 28W 7*4 DRIVER.!!!This price don’t ... SCREW.COST:(BELOW 100SETS) SS30H1: 43USD,FOBSHANGHAI.DRIVER for 30W :8.5USD,FOBSHANGHAI.PLEASE Arrange LEDS ... BELOW 100SETS)SS30H2-H WITH HOLDER: 56USD,FOBSHANGHAI.DRIVER for 30W(10LEDS IN SERIES,3 paralleling) ...