Hi thanks for the feedback.
Small, cheap microcontroller is probably the best option, Also Led should not have any issues because I am not planning on overloading it... Bright white led seem bright enough to me at normal current rating.
I will see what I will do.
Generic optocoupler led blinker circuit that I found on YouTube seems to give me good results but I will have to see how much the parts will cost.
Optocouplers and resistors are dirt cheap on eBay but I will have to see about capacitors since each oscilator needs 220-330uf capacitor to get the rate I want approximately.