LEDs are always marketed as lighting options that give more brightness per watt of electricity. The claim is true if LEDs are used for spotlighting. LEDs are unidirectional source of light and thus they are excellent for spot lighting. LED luminaires that are available for general-purpose lighting have inbuilt reflectors that spread the light in all directions. And the use of reflectors causes decrease in brightness per watt. This results in their efficiency come down to as low as that of fluorescent lights. So if you compare a T5 tubelight with a LED light that gives light at 120 degrees angle (we mention angle because LEDs are unidirectional and they are marked for an angle based on the reflectors used), the amount of light that LED tube will give per watt will be similar to that of T5 tubelight.