Light bulbs are going sky-high at supermarkets.Retailers are stacking them high and building power displays of light bulbs not only to attract impulse sales, but to demonstrate that they can challenge other competitive retail formats -- club stores, home centers and mass merchandisers.Besides the power displays, retailers are using low price points, special promotions, such as daylight savings tie-ins

Light bulbs are going sky-high at supermarkets.

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TAGS: Walmart