One cannot claim I don’t believe in recycling. This is one of the most recycled jokes ever and a bad one at that. The answer is casual to the most obvious observer. Actually, that’s kind-of an old twist of words too, but I kinda like it. On the other hand, my wife is more than tired of it and reminds frequently.
At any rate, the obvious answer is zero. No self repecting lib would replace a light bulb. They love stumbling around in the dark. Those few who do like light, prefer paying someone else. It is below their dignity.
Speaking of light, the vast majority of libs deny the greatest Light of all. In John 8:12 Jesus proclaims to all, “I am the light of the world.” Instead of accepting the Light, they defiantly prefer stumbling around in the darkness.
Worse, they pretend to be of great vision and every chance they get, lead us into destruction.