Photosynthetically active radiation (PAR) where you are

This PPFD app will tell you the photosynthically active radiation on a sunny day for most places in the world.

You can adjust the date and time, which can be useful, for example to compare different times of year, or different times of day. Note that I haven't built in any daylight savings times adjustments, so figure that this app is making the calculation for standard time at every location.

As a check, I've added in a recent update some…