Luminous efficiency ok, installation well, service Pooh

For the already high price you have certain expectations.
The installation instructions are pretty poor.
Having been a einaderige wiring was installed, I wanted to switch to 2 cables with this lamp.
When I send an email with the Service 2 specific questions were asked about the connections made, which were not clarified in the instructions, the terse reply came I should feel better consult a mechanic.
Last Product what I earned from this manufacturer.
Meanwhile, the light is installed.
As a downside, I see the on / off switch, it is totally vague and without good pressure point.
Tw. You have to press 3 times until it times are concerned.
The luminous efficiency is good.
For a price well over 50 I can not recommend it though.