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 l…
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