Do you have a dynamo or an alternator fitted? I will refer to "generator" to cover both.
When the engine is idling very slowly, then the light will come on as the generator is not producing enough current to charge the battery. This is normal. As the engine revs increase, the power from the generator increases, and the ignition warning light is extinguished.
When the choke is out, it operates a cam on the carburettor and this increases the speed of the engine. This may be sufficient speed to extinguish the light. When you push the choke in, the revs die off and the light might come back on. However, when you are driving at more than a few miles per hour, the revs should always be sufficient to extinguish the light. If the light comes on when you stop at a junction, but goes off at other times, then nothing about which to worry; but if it comes on whilst moving fast, then something is not right. There is no electrical connection to the choke to operate the light directly.
