system
Given the following post, respond as if you're commenting on Reddit:
human
Why don't we use LEDs for all our lighting needs?  

LEDs use a higher portion of the energy supplied to them to emit visible light than incandescent bulbs and florescent bulbs, and don't contain mercury like florescent bulbs do. Why don't we use them for everything? Is their initial cost so much higher than the other types of bulbs that it wouldn't be cancelled out by energy savings?
gpt
Professional lighting designer here.  It's incredibly hard to maintain batch uniformity with the current methods of LED manufacturing, which makes it hard to produce a consistent product.  

Additionally, the white color created by 'white' LEDs consists of relatively narrow peaks of light on the visible spectrum, providing poor color rendering an irritating color of light.  Incandescent and even CFL lamps produce a more uniform, curved output on the visible spectrum, which more closely resemble the sun, which makes us more comfortable.