A system and method to regulate voltage is disclosed. In one embodiment, there is an immediate release dosage form, as well as two or more delayed release dosage forms, with each of the dosage forms having a different release profile, wherein each reaches a Cmax at different times. The semiconducting layer compositions exhibit good film-forming properties and high mobility. The third lens group G3 comprises the fourth lens L4. The present invention provides 5,6-trans-2-alkyl-substituted vitamin D derivatives of Formula : wherein R1 is straight or branched-chain alkyl; and R2 is straight or branched-chain alkyl optionally substituted with hydroxy. , closer to a home location at night and further away from the home location during the day.