Switch Shows Off Liquid-Cooled LED Bulb Cleantech News and Analysis Switchs first bulbs it launched a 100-watt incandescent equivalent at Lightfair, and also has developed 40-watt, 65-watt, 75-watt equivalents are supposed to go on sale later this year. An important thing to note about the Switch bulbs is that they are also supposed to retail for under $20 for the 40-watt, and will likely be far less expensive than the current LED bulbs on the market that can cost as high as $40 to $50 per bulb. That price point gives the Switch LED bulb a lot quicker pay off in energy savings to the buyer. Switch says its bulbs use 85 less energy than incandescent bulbs and the return on investment is about a year. This could be a game-changer in the industry if consumers actually respond and start buying these when they come out.