This is an article on increasing sales in a restaurant and bar situation. More precisely, it is about lighting. The reason why it increases sales is that people are naturally drawn to them. Lights behind the bartender, along the shelved liquor, draw people directly to the bar; the cooler the light, the more people will be drawn to them, and more likely to spend, generally-speaking. Colors can also be used within a LED bulb to further subconsciously-lull the customers into spending more money.
Read more: Restaurant Marketing: How LEDs Can Increase Your Sales.