Royalty free Efficiency image: Energy efficient lightbulb

Royalty free Efficiency image: Woman changing lightbulb

Royalty free Efficiency image: Woman changing lightbulb

Royalty free Efficiency image: Businesswoman talking on two telephones

Royalty free Efficiency image: Stack of paperwork in in-tray

Royalty free Efficiency image: Businessman talking on two telephones at one time

Royalty free Efficiency image: Open, glowing document binder

Royalty free Efficiency image: Businessman standing near flip chart with drawings of arrows

Royalty free Efficiency image: Young boy outdoors holding an environmentally sound lightbulb

Royalty free Efficiency image: Young boy outdoors holding an environmentally sound lightbulb and a standard lightbulb in his hands

Royalty free Efficiency image: Female nurse holding syringe, close-up, focus on hand and syringe

Royalty free Efficiency image: Senior woman preparing to brush teeth at home

Royalty free Efficiency image: Senior woman reclining in bed, holding glass of water and prescription bottle

Royalty free Efficiency image: Senior woman holding glass of water and prescription bottle, portrait

Royalty free Efficiency image: Senior woman sorting through coupons at home

Royalty free Efficiency image: Stopwatch

Royalty free Efficiency image: Foremen on dock

Royalty free Efficiency image: Foreman meeting with businesswoman on dock

Royalty free Efficiency image: Warehouse worker using laptop computer

Royalty free Efficiency image: Foremen having conversation in warehouse

Royalty free Efficiency image: Businesswoman Writing in Weekly Organizer

Royalty free Efficiency image: Spiral-bound Daily Organizer

Royalty free Efficiency image: Businesswoman Marking Hearts on Calendar

Royalty free Efficiency image: Businessman smiling at camera with arms folded while his clones use laptops in background

Royalty free Efficiency image: Young woman holding pieces of paper, smiling at camera

Royalty free Efficiency image: Coffee cup and large stack of documents on desk

Royalty free Efficiency image: Male doctor and female doctor in surgical scrubs, portrait

Royalty free Efficiency image: Egg with bar code and numbers

Royalty free Efficiency image: Energy saving lightbulb

Royalty free Efficiency image: Woman with a compact fluorescent lightbulb

Royalty free Efficiency image: Asian warehouse worker scanning shipment

Royalty free Efficiency image: African warehouse worker scanning shipment

Royalty free Efficiency image: Woman watching man work in a home office

Royalty free Efficiency image: Man working at his desk in a home office

Royalty free Efficiency image: Businessman sitting at a desk and thinking

Royalty free Efficiency image: Side profile of a young man using a laptop at an airport

Royalty free Efficiency image: Businessmen working in an office

Royalty free Efficiency image: Female florist with bouquet for customer, smiling

Royalty free Efficiency image: Young businesswoman or secretary making an appointment in a diary

Royalty free Efficiency image: Fuel efficient toy car

Royalty free Efficiency image: Businessman holding a laptop and looking away

Royalty free Efficiency image: Energy Efficient Lighting

Royalty free Efficiency image: Tampa, Florida.

Royalty free Efficiency image: Close-up of a young woman smiling with her daughter

Royalty free Efficiency image: still life of low energy light bulb

Royalty free Efficiency image: Girl smelling flower

Royalty free Efficiency image: Electrical outlet and black and white plugs

Royalty free Efficiency image: Goalkeeper chasing ball