I ordered a 550 model, they sent 450. When you place an order for this particular model, you set the color, power, dimensions in the menu . Accordingly, I set large values, while embarrassing that the price did not change. Well, in the end, the one that was needed did not come. In the order itself, it is not at all clear which model was ordered, there is no designation 550 or 450 in the order receipt, only the model and power 50W are written. I think this is consumer fraud. in the center of the room of 14 sq. M, the spot of light is very bright, of course, there is almost not enough at the edges. But in general, at first glance, enough.