BBC Focus Magazine

[IQN870]

For Christmas my son was given a solar powered robot.
The instructions state it will work when left in full sunlight or held under a halogen light source.

It won't work when exposed to any other light source such as an LED torch or an energy saver bulb.

If light is made up of photons, what's difference does it make as to how they are emitted?

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i should imagine its the intensity of the light IQN870, also the LED and low energy are not full spectrum which may have a bearing also