[nanomonkey]

I'm sadly unable to find the original study where I found this. If memory serves me it was from around 2003.

Not sure how it would increase bacteria, as bacteria don't photosynthesis light, unless the lights gave off sufficient heat to increase their activity. If anything I would think the light might inhibit bacterial growth.

[LudoA]

This is really interesting. I'm tempted to attach red LEDs to a battery and put it in the fridge. But it would be quite tricky to measure whether it works. (Almost impossible to do accurately, without different fridges.)

[londons_explore]

Put two cardboard boxes in a fridge. Put a leaf of lettuce in each, and a red LED in the top of each box.

Turn one LED on, while the other stays off.

Observe the leaves of lettuce after a week.

[rubatuga]

Cyanobacteria, purple sulfur bacteria, and I forget another type, those all undergo photosynthesis

[nanomonkey]

I stand corrected! Are any of those likely to be found on vegetables, and break them down?