Light Sources -- Nanoscale LED Debuts -- Diamonds Improve Quantum Crypto -- Laser Bridges Infrared-Microwave Gap -- Atomic Cascade Broadens Laser -- Cheaper LED Shines the Right Light -- Material Turns Infrared to Green -- Artificial Crystals Change Laser Colors -- Laser Speeds Data through Air -- Laser Pulse Penetrates Glass -- Data Transmission -- Fast Quantum Crypto Demoed -- Data Transfer Demo Sets Speed Mark -- Shortcuts Lighten Wireless Load -- Quantum Secrets Ride Phone Lines -- Light Switch Promises Powerful Computers -- Photons Heft More Data -- Team Spins Mirrored Fibers -- Polarized Light Speeds Messages.