Enlighten too little, not practical

I found the cool idea, but several negatives make me regret my purchase:
- The lamp is quite light and unstable
- Design is nice but nothing more and the white wire is ugly and short
- The choice of colors is not practical, for example, difficult to select just white light
- I have not managed to vary the brightness or the intensity (???)
- And above all it does not light very strong even if it is the most powerful product range
Despite the promo price (offer reconditioned), I will not keep this article.