White LED x 18 driver

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Dear PI Experts: 

need PI suggestions for white LED Vf=3.5, @135mA, 18pcs in series

Isolated and non-isolated

120Vac, 230Vac or Universal

PF >>0.9, THDi <<20%

efficiency >85%

meet UL, EMI, FCC without EMI filter if possible

low part count

tks

Arthur

As shown in the attached file, there are many design examples of 5 W - 15 W LED driver using LinkSwitch-PH and LinkSwitch-PL in the Design Support Menu in PI Website.