The links would point to 2x3w LEDs on goosenecks for $100 or more. I saw also options for much more light, but at $500.
So far, I didn't find options for the LEDs, their heat sinks and condensers only.
I've now ordered some parts for less than $100, and for up to 6x5W LEDs. Total 30W vs 6W. For low ISO and high exposure speeds, this shall make a big difference. I do enjoy ISO 100 or 80 and short exposure times...
Cameras will adapt to 6 to 30W, and a lot of Lumen, our eyes won't...
With 30W, I'll take some extra care. At the least, feeding the LEDs with low power for positioning. Then high power for shots.
Gooseneks not being the best for precise and thigh positioning. Might be suitable for inspection, not for microscopy. According to what I'll get out from the parts and LEDs I ordered, I'll go for some "magic arms".