please can somebody recommend me improvements in circuit in enclosure?
I would like to improve dissipated power on resistor R2, which is more then adequate for this kind of circuit at 100mA LEDs (I have 6pcs of 0.5W resistors in paralel now and it is not sufficient).
It should be protection resistor - protection from spikes in grid. Can I decrease value this of rezistor (I suppose not)?
Or would You recommend to me another type of circuit (switching regulator)?