Light bulbs and fixtures should be cleaned. Turning off lights is important when leaving a room. Lighting costs can add up quickly. Sometimes it is difficult to distinguish between adjectives and adverbs. Adjectives always modify nouns or pronouns.
Adverbs always modify verbs, adjectives, or adverbs.
The early shopper may get the best deal. It is best to arrive at the store early. Recently it has been found that fluorescent lighting is much more efficient than incandescent lighting. Compact fluorescent bulbs that easily screw into conventional incandescent sockets are available. In general, most homeowners could quite easily save on energy costs by incorporating more fluorescent lighting into their homes.