I think the first are max at 6w, they does not similar to 10W drivers. For comparison ordered other 20 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 (ORDERED HERE) has at beginning 400V 22uF and at end 50V 100uF. In total they are not the best solutions that i have. I have took it with hope of higher frequency with at least same pulsations. But do not checked yet. And the item does not correspond to the photo - in 500mA (15W) driver there is no transistor and bottom circuit.
Shipped after 5 days. Arrived 31 days after shipping. I've tested it with 3 * 12V modules in series. Efficiency is about 81-86%.