I have one, but it is too small. It's not 10,000 lux at one foot away from the unit. I do not know why some manufacturers do not just stick to the 10,000 lux rule!
My pdoc recommended Amazon for finding one. Verilux has all different sizes, not all are 10,000 lux. Same with some other companies. Buyer beware.
That said, Verilux is a respectable company and has some good models.
According to my pdoc, who also uses a SAD light, we should be looking for 10,000 lux at 1 foot away from the lighting device.
I hope this helps!

WC