Incandescence is the most efficient way to produce light in the universe, generating more light by the same amount of energy than luminescence, however a lot is in the invisible infrared range. On the other hand luminescence is the least efficient way to produce light in the universe, but more falls within our visible range, hence the apparent increase in lumen, but not in lux. Total light output is measured in lux and visible light output is measured in lumens, A good analogy to visualize the polarity between incandescence and luminescence light genesis, would be like a classical oven compared to a microwave one, one heats from the outside to the inside – in a classical way, while the other heats in an inverted manner – from the inside to the outside. Incandescent and luminescent light do have their unique applications, for example incandescent light is king for high fidelity thanks to its broadband continuous spectrum, at the expense of higher operating costs.  Luminescent light in the other hand is intrinsically a superposition of a handful of frequencies, that may appear white to the eye, but in reality has real spectral voids where there is literally no light present, making it excellent for lumen efficiency and cheap operating costs. Luminescence is also ideal for digital information transmission because this it can be further reduced to just one single frequency, very useful for lasers and fiber optic high-speed data transmission, indispensable to our modern worldwide communications.