ABC's "Shark Tank" - Season Five

SHARK TANK - "Episode 529" - Two Dallas entrepreneurs demonstrate their smart light bulb which can be programmed from a mobile phone for home or business, a father/son team from Las Vegas have a high-tech replacement for a cork that helps preserve wine and olive oil, parents from Washington, D.C. unveil their subscription service of carefully-curated children's books, but they only have 85 subscribers to date, and a Sarasota, FL woman has a fort-building construction kit for kids that makes castles, pirate ships and cars. Plus, a follow-up on Breathometer, one of the show's most popular deals-5 Sharks invested in it earlier this season. It's a breathalyzer app that works with your smart phone to check if you are over the legal alcohol limit and if you are, can call a taxi for you, recommend a hotel and more. This episode of "Shark Tank" airs FRIDAY, APRIL 18 (9:00-10:01 p.m., ET) on the Disney General Entertainment Content via Getty Images Television Network. (Photo by Adam Taylor/Disney General Entertainment Content via Getty Images)