I've been using this light for extreme macro/micro photography.
It weighs very little and has adjustable intensities, colors and
interchangeable color filters.

See included video for example of intensity and color adjustments.

The back of device displays green bars indicating battery status.

It's now a necessary tool for my microphotography as it is not big and bulky like
other lights. Nor does it require heavy batteries. Travels easy, takes up little space in camera bag.

The microscopic leaf pics were taken by simply holding it behind leaves
and adjusting intensities with my thumb. The light fits into the palm of your hand thus
very easy to hold behind, in front, above, below plants/insects and small objects.
You can also use it as a microscope base light/back light.

It has accessories for attaching:
-1/4-inch screw for camera
-clip for clipping to objects

I now find regular use for this in my photography/videography tool set.
Due to its compact size, light weight, adjustable colors and intensities
it's always in my camera bag now.

Definitely recommend if you are doing above types of photography and want to travel with
lightweight hardware.