OK, i was just checking and testing the whole experiment after taht i have some result it was good to study..
i have used series combination of two red led which has Vf of 2V and combined several parallel led with them near about 15+15=30 it was working fine as i increases the led the currents increasing very slowly in very few mA near 2mA. and the voltage across 110ohm was 1V, after that i have added total 12 parallel 110ohm one by one the voltage become across R was 0.78V and current also increases and there was not so much power diss across R which was achievement then earlier....
so, my red led project is over and i am thinking about white LED which has Vf of ~3V so, how to combine with 5V 2V across resistance so, should i use 9V for it making 3 or 2 in series??/