The Momolight is somewhat easier to build with a reasonably detailed de_script_ion on how to do this. The Atmolight however looks to have some extra features which the Momolight does not have and the instruction (although in German) are way more detailed, also with PCB layout and so on (today received an e-mail from China about my PCB's being made and ready in 2 weeks ). I was not able to find instructions in English yet for Atmolight. If the Atmolight I am building really works well I might consider translating the Atmo instructions into english.