This is not a spell. It is, however, the magiq equivalent of a catalyst.
Thought to originate from the collective consciousness and creativity of the Aboriginal Dream time myths, the full title of this is actually "Many hands make work light" which has fallen into common parlance and been misquoted for millennia.
When employed correctly, the circle of light, physically created round the task being done ensures that an increase in participants is only beneficial, and that the participants work in better harmony. This is often completed by singing a round, like "Frere Jacques" where each participant is building on the lines of the previous singer.
Many Hands can also be used to enhance or create light, since, with change of use over time, the title can be read as Many Hands make light. This often occurs as a side effect of great team work in the fields of magiq and creativity.