I'd like to comment on the Qubit system, since it has been touted as the
greatest thing for teaching photosynthesis. Robert Hodson commented that
they have a "high fiddle factor", and in my experience I found that "fiddle
factor" to be extremely frustrating. If one does not have a particular
talent for tinkering they are not that easy to get up and running. They
are definitely **not** plug-n-play, so don't plan on opening up the box one
day and taking measurements the next.