Good power supplies. I thinl they are max at 6w, they does not similar to 10W drivers. For comparison ordered other 10 and 15 W drivers. The first have no electrolyts at beginning of circuit, at end 2 by 35V, 100uF everything. The second has at beginning 400V 15uF, at the end 63V 100uF. The third has at beginning 400V 22uF and at end 50V 100uF. In total they are not the best solution that i have. I have take it with hope of higher frequency with at least same pulsations. But do not checked yet.