It really does depend upon what you mean by 'shift'.

For purely-resistive circuits, the load current is in phase with the supply voltage. For reactive circuits, the load current will lead or lag the supply voltage; for capacitive-resistive circuits, the load current leads, whereas for inductive-resistive circuit, the load current lags.

You can change the angle by which the current leads or lags (the 'phase angle') by changing the amount of resistance or reactance.

Robert L. Boylestad has written:

'Solutions manual, Electronic devices and circuit theory'

'Transparency masters to accompany Introductory circuit analysis'

'Essentials of Circuit Analysis' -- subject(s): Electronic circuits, Electronic circuit design, Electric circuit analysis

'Introductory circuit analysis' -- subject(s): Textbooks, Electric circuit analysis, Electric circuits, Data processing

'Introductory circuit analysis' -- subject(s): Textbooks, Electric circuit analysis, Electric circuits, Data processing

'Electronic Devices & Circuits'

'Experiments in circuit analysis to accompany Introductory circuit analysis, 5th ed' -- subject(s): Laboratory manuals, Electric circuits

'Solutions manual to accompany Introductory Circuit Analysis'

'DC/AC' -- subject(s): Electric circuit analysis, Electric circuits

Roland E. Thomas has written:

'The analysis and design of linear circuits' -- subject(s): Linear Electric circuits, Electric circuit analysis, TECHNOLOGY & ENGINEERING / Electronics / Circuits / General, Design and construction

'Solutions manual to accompany Circuits and Signals'

'Circuits and signals' -- subject(s): Interface circuits, Linear integrated circuits

Evert Seevinck has written:

'Analysis and synthesis of translinear integrated circuits' -- subject(s): Linear integrated circuits

Usually the light bulbs used are resistive components, but the energy savers used now a days are inductive components and they are used because they consume reactive(inductive) less useful power and save useful or real (resistive) power.