This a highly sensitive and very interesting and most useful Dark detector circuit using LDR and comparator IC LM358. Automatic Light Switch off in the day and automatic switch on at night. This is very sensitive LDR darkness circuit using LM 358. This circuit does not use the relay. The load is connected with triac. **No flicker**. side area of LDR should cover with black tape for protection of light falling of Load bulb or LDR should not get the light of output load light for flicker less operation. This circuit uses 220v ac so this a dangerous circuit so be careful when testing. for more circuit diagram go to https://www.circuitspedia.com/