With the average American home using some 40 lights, interactive computerized lighting selectors are helping shoppers decide which fixtures are the most efficient, reports Intermark Corp.

The battery-operated selectors, located on the shelves of lighting-equipment displays in stores, provide accurate, practical information for customers sometimes confused by the plethora of choices.They often are a welcome sight as a replacement for dog-eared, soiled catalogs that all too often have key pages missing, notes Intermark, a designer-producer of interactive computer equipment.

Answers are provided on a liquid crystal screen to questions posed by shoppers who simply press on a key pad.

Also available are recommendations concerning such items as new high-tech bulbs, ideas on the use of direct, fluorescent and reflected light systems and halogen lighting.

Information also is available on the use of outdoor lighting in remodeling homes inexpensively.