perfecto
Good devices, for the price, tested 3pcs of 18W at 450mA with cheapest leading-edge triac dimmer. There are TWO version: EWI with single big capsitor and non EWI with two small cap, they are slight different. Both works well, regulate well, stable output current. EWI version is really good! Stable voltage without pulse, no flicker, no noise. Non EWI vresion has big output voltage ripple 7V, can produce LED flicker, and has accoustic sound. Both driver have NOT 450mA, about 350mA at full load 42V 120 Ohm. Reccomend to buy, the price is good, ask -EWI version with single big capasitor.