http://www.amazon.com/Koncept-AR5000-C-MBK-FLR-Z-Bar-Floor-Metallic/dp/B00JDYOX0M/ref=sr_1_4?s=industrial&ie=UTF8&qid=1410866790&sr=1-4
It's pricy, but a fantastic lamp.
This price is probably hidden shipment costs
I do not like in this lamp for example this additional power adaptor which will lay somewhere on the floor .
At this price above 100$ I'd expect have it embended somewhere inside bottom case or in this vertical pipe and have only plug to wall socket 230VAC.
BTW: While it costs 300$ and it is easy to source nice 15mmx15mm pipes in the price below 1$/meter and it might require not more than 2 hours to complete build of such thing, I think that saveing or earning more than 100$/h is not so bad payout, so it is better Do It Yourself after working hours and forget about this one
There is something else-while I had light sensor connected to scope started to analyze light bulb and other new EU recomended electronic energy saving replacements and its power output of course has 100Hz frequency components and in the case of old light bulb which means when we move something in this light we have stroboscope effects and I do not care that some people say that in theory human eye can not react with more than 25 fps and it is fine-I prefer constant output continous power while it is what humans saw within the whole time of its evolution-Sun light or fire light.
So, it could be interesting to make measurements similar to those I've made using common light sensor and forget about all these light sources which output 100Hz or other stroboscope efects lighting which I hate
We get 100Hz lighting pulses while in the case of 50Hz there is 2*50Hz pure resitance power component in light bulb output
p(t) ~ (1-cos(2*50Hz*t)/2
and it is easy visible using even slow LDR light sensor and microphone
xscope soft and nice fits into theory
I was supprised for the first time I saw this while expected 50Hz, but of course quick look into power equations leads to easy explanation why we have 100Hz stroboscope light bulb oscilations.