Bloomberg Back in 1972, engineers working at Osram Licht AG set their sights on developing applications for infrared. The unit of Siemens AG in southeastern Germany went on to develop an expertise in the light, used in night-vision equipment and galaxy-gazing telescopes. Almost half a century later, Osram is a stand-alone lighting company and infrared is one of its fastest-growing …

Bloomberg Digital Realty Trust Inc. agreed to buy DuPont Fabros Technology Inc. for about $4.95 billion in stock, a deal that would add to its data-center properties in areas such as California’s Silicon Valley. Investors in Washington-based DuPont Fabros will get 0.545 Digital Realty shares for each of their shares, the real estate investment trusts said in a statement Friday. …

Bloomberg Verizon Corp., AT&T Inc. and the rest of the US wireless industry have a big boast for this year’s crop of smartphones: thanks to network upgrades, devices will be able to download as much as a gigabit of data in a single second — speeds 100 times faster than before. But that won’t be the case for Apple Inc.’s …