Outdoor light sensor

[jodeba]

I am looking for a cheaper alternative for the Somy Sunis sun sensor.
I want to measure outdoor light in lux to automatically close or opens my sun screens.
Does anybody has suggestions?

[Spiro]

Detecting strong(ish) sunlight

Bit of an interesting conundrum, but I’m sure there’s a simple solution… My living room faces south-east (northern hemisphere), which means in the morning, if it’s sunny, I get a blast of sunlight for a good few hours which is enough to turn the living room into an oven by lunchtime. As such, I’m looking for a method of detecting such sunlight (or even better predicting if it will happen!), so I can turn my heating off - why burn energy when I have it for free coming in the window… I initially…

This thread may give some ideas.