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Surge Protected Cheap Transformerless Hi Watt LED Driver Circuit - This circuit is only a proof of idea just to demonstrate that the great old 555 clock can even now be utilized for a cutting edge and very requesting application. 

 Parts list

R1 2.2 kΩ / 0.1 W
R2 10 kΩ / 0.1 W
R3 100 kΩ / 0.1 W
R4 470 Ω / 0.1 W
R5 1 kΩ / 0.1 W
R6 2 Ω / 0.25W
C1 220 pF NPO ceramic disc capacitor
C2 10 µF / 16 V electrolytic
C3, C4 470 µF / 6.3 V, low ESR
L1 custom made transformer, see text
L2 47 µH / 2 A (TDK SLF 12575 / Fastron PIS4728 series)
D1 1N4148
D2 SB240 (SB360, MBRS240, MBRD650)
D3 BZX55C 4V7, 4.7 V Zener Diode
D4 1 W High Power LED
T1 BC 337-40 (2N2222A)
T2 BC547B (2N3904)
T3 2SK2869 (IRLR2905, IRLZ 34N)
IC1 ICM7555 (TLC555, HA17555)

It is in no way, shape or form an upgraded circuit that can be promptly utilized for large scale manufacturing. It shows up generally enormous by today's standard on the grounds that I utilized just through opening segments. You may recoil it to 50 % of its unique size in the event that you utilize cutting edge SMD parts. You might likewise have the capacity to build the productivity of this circuit. Lamentably I didnt't have room schedule-wise to do broad estimations with a wide range of inductors. There may be some space for advancements.