AmScope LED-144B-ZK Compact Illuminator Ring Light LED Light Source

Very bright and easy to install

Its really good

Decent quality, compact light

It is easy enough to attach it to a barlow lens or to the microsope housing. One star off due to a design mistake where the AC plug is not an L-shaped one so that it would fit neatly between the barrel and the back of the focusing rack. I purchased a coiled extension cable to solve this issue, and everything is flawless.