Self-lighting self-closing controller circuit for advertising lights

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The self-Lighting self-closing controller circuit for the advertising light is shown in the figure.
The working principle is as follows: IC1 and peripheral components are used as light control switches. Due to the small R2 illumination resistance during the day, the 2 and 6 feet of IC1 are higher than the potential, the 3 feet are at a low potential, and the relay J is not attracted. Points J-1 and J-2 are in the off position. At night, the resistance of R2 becomes larger, IC1 is 3 feet flipped to high potential, and relay J is attracted. After IC2 is powered, since the voltage on C5 is zero, the high potential of the 3 pin turns on the thyristor, and the advertising light ZD is on.