Programming LDR

Here is a newer circuit which uses more realistic values of the LDR resistances. Note that the LDR resistances on the data sheet you posted are in KΩ; the critical resistance at which the LED should turn on is ~ 35K.

thank you for your help! Thank you all, I'll ride the circuit and then say something!

just did not realize where I turn on the lamp!

Click to expand...

Often an LED is represented by a diode with squiggly lines coming from it. Your second clue would come from the part number qtlp690c which Google says is an LED.