Hello, Im doing Solar Warning Light project divided into three part which is charger, sensor and flashing light.

My circuit includes sensor which is using phototransistor but the procedure where actually when sensor detects light, the LED 1 - LED 6 should not work and on the other hand, when in dark or sensor detect no light, the LED should be working and flashing.

But the problem is why do the sensor still work when the sensor detects the light?

 

Whats the part number of your photo-transistor

 

Try connecting another diode or two in series with the one in the emitter path of Tr5.