I bought two LED ceiling lights at Amazon.co.jp. Luminous flux of the first light is 3800 lm, and luminous flux of the second light is 3200 lm.
It cost 8072 yen ($79.14 €57.25) for the 3800 lm light, 6436 yen ($63.10 €45.65) for the 3200 lm light. The very small remote controller came along with each light. Users have to be careful not to loose the controller.