Nowadays, more and more consumers buy LED tube lighting, and they are unhappy with fluorescent bulbs, because of their tendency to flicker when being powered on and at the end of their life span, there are environmental issues that also enter into the equation. The reason they are so bad for the environment is that they contain mercury. Scientists have been aware of this for years, but it is doubtful that anyone anticipated quite the impact having millions of mercury containing bulbs in the world, could pose to the environment.
Does LED tube lighting flicker? Yes, they do flicker, but at a rate that is so fast, the human eye is unable to detect it. However, there is LED tube lighting that is manufactured to flicker or aesthetic reasons, and not through any manufacturing defect. Fluorescent lights are known to flicker annoyingly, yet that is the least of the dangers they pose. Toxic metals pose a far greater threat in fluorescent bulbs. Neither LED tube lighting flicker nor contain hazardous substances. In both respects, they are the better.
Therefore, LED tube lighting is now built with filters that help even out the amount of electrical current that are being generated to them. The effect is a flicker that is so steady and so fast that it cannot be detected with the naked eye. Before being installed, LED tube lighting was known to flicker a little bit with each fluctuation of electric current they received. Nowadays, LED tube lighting is as reliable as any other form of light bulb, and is far better for the environment.