The way we produce light for the purposes of being able to see in the darkness have changed, but as with most things, more rapidly than ever in our lifetime.
Fire would have been the first way, then doing bizarre things like heating limestone to make it glow, and making candles to allow a wick to burn with a steady supply of fuel, and eventually we learn to burn flammable gas.
Edison’s use of electricity to heat a wire, protected in glass-enclosed environment where it could be kept from burning in air, brings us the filament light bulb. More recently we had the fluorescent tube – making an enclosed gas glow. Now, of course, we are seeing LEDs give us colder, colourful, more efficient lighting. I’m sure it won’t stop here.
We can’t physically see without light, though of course if we are blind, the amount of physical light present is irrelevant. Jesus is light in the darkness, which has not changed its form in 2000 years. It is the same light, and just as real. If you do not allow that light into your vision, if you do not receive Jesus, you do not see. You remain in darkness.
We do need fresh ways of reflecting that light, but it does not need changing. Just unhiding.