Elma Electronic (Fremont, CA) offers the M-tube LED light tube system with new 5mm and 10mm diameter options. Other standard diameters include 6mm and 8mm. The light housings come in double-ended or optional single-ended configurations. Lengths of up to 2m are available. The light guides are rugged with a hard-plastic light bar tube that stays cool even when brightly lit.
LED Light Tubes