Abstract: A light-emitting diode (LED) tube is applied to a lamp holder with a ballast, and has a lighting module, a first control module and a second control module connected to two ends of the lighting module, and a harmonic elimination module connected to the first and second control modules and parallelly connected to the lighting module. Each of the first control module and the second control module has a simulation circuit unit and a rectification unit. Each of the simulation circuit units and the harmonic elimination module has a switching element. The first and second control modules adjust electrical signals from the ballast, and the harmonic elimination module eliminates harmonic waves generated by the ballast so that the lighting module is compatible with the ballast and is lit. Accordingly, the LED tube can be directly mounted on a fluorescent lamp holder with the lamp holder intact.

Abstract: A light-emitting diode (LED) tube is applied to a lamp holder with a ballast, and has a lighting module, a first control module and a second control module connected to two ends of the lighting module, and a harmonic elimination module connected to the first and second control modules and parallelly connected to the lighting module. Each of the first control module and the second control module has a simulation circuit unit and a rectification unit. Each of the simulation circuit units and the harmonic elimination module has a switching element. The first and second control modules adjust electrical signals from the ballast, and the harmonic elimination module eliminates harmonic waves generated by the ballast so that the lighting module is compatible with the ballast and is lit. Accordingly, the LED tube can be directly mounted on a fluorescent lamp holder with the lamp holder intact.

Abstract: A strap-on shoe anti-slip device includes a ground-contacting belt-like main body connected at two lateral ends to two extension straps, and a fastening unit having a male and a female fastener separately assembled to outer ends of the two extension straps. The male fastener can be detachably connected to variable positions on the female fastener for the strap-on shoe anti-slip device to form a circumference-adjustable loop structure, which internally defines a size-adjustable opening for a front portion of a shoe to extend therethrough and be bound thereto. The fastening unit is operable to selectively open or close the loop structure. The belt-like main body is provided on an underside with an anti-slip element, which may be differently configured to provide different anti-slip effects. A user may conveniently change shoes to have a specific anti-slip effect by selecting a strap-on shoe anti-slip device with a suitably configured anti-slip element.