Editing Yellow light

'''Yellow light''' means '''caution''' and an uncertain [[score]].
It may also signal a lack of [[price]] or [[price premium]] data,
and the inability to flash a [[green light]] or [[red light]].

It may also signal uncertainty when two green light products are available
at the same [[point of purchase]].  The only way to recommend one is to 
know the [[price premium]] the [[consumer]] is willing to pay, which will
require translating the [[score]] into [[currency]], so that a device or
him/herself can calculate whether the price plus the premium they find to 
reflect its merits, is more favourable to one product or the other.  With
all this information in the [[database]], the yellow light could simply be
a price, meaning '''buy at this price'''.  The acceptable product which comes closest to the buy price is the one that the consumer should buy.

Possibly in this instance, however, the [[end user]] will want to review
the detailed comments about the product looked up by [[barcode]].  There
may be good reasons not to use the same criteria to evaluate both of the
products.  Comments are a note in [[Simple English]] about issues with, and 
merits of, the [[product]].  Probably filtered from [[opinion wiki]].

[[Hardware requirements]] to make this easy at [[point of purchase]]
are severe.  It may be these requirements that kill the project!  So
coordinating with other [[essential projects]] is quite important.
One of those other projects may actually help justify the hardware.