Solar Crookes Radiometer Glass Windmill Handmade for Party Home Decoration Gift L (Green)

I have always had radiometers in my garden window. When my prior one stopped working, I decided to purchase this one due to the addition of color on the glass. It makes a nice addition to my garden window and looks sharp. Works nicely and is a fun conversation piece. Nice quality and excellent price.

Wasn't sure what to think of it at first, but turned out to be a cool piece to have at home

I got this radiometer to replace my old, science fair type radiometer that my cat knocked off the window sill and broke. I was perfectly happy with the old one. This one costs about twice what the el cheapo one costs, but it is a nice looking fully blown glass radiometer.First thing I noticed is the vanes are not as sensitive as the el cheapo - i.e. it takes more direct sunlight to get it spinning, and it won't spin as fast as my old one. Another difference - the vanes should be black on one side and white on the other - this one the side opposite the black looks like some kind of cheap silver paint or tin foil. Other reviewers have mentioned the black paint may flake off inside the bulb.I'm guessing the slow speed of this one is due to a weaker vacuum inside the bulb. I don't really know. I'm going to keep it, I guess until my cat decides to break this one too.

All the ones I received including replacements had the metal flaking off the fins inside the glass and coating the inside. No way to fix and ended up just getting a refund.

Got all three yiluren radioimeters. the blue takes the least light to get it to spin, Taller than the other brand.

works well.could be better built (the black paint and leaves are not pristine looking)