My Smart LED's

This is a very simple project .The LED's glows automatically at dark and becomes off at daylight .This circuit comprises very few components.

Components requried:-
1)transistor-BC558
BC548
2)LDR
3)resistor-10k
4)variable resistor
5)LED's
6)button cell

Solder the components as given in circuit.

and at last .....it's done.It look's to cool