My first conversion 30 years ago used a box of tricks to convert Ohms from tank contents gauge on the tank, into a range to suit the fuel gauge already in the classic old Ford's dash. It worked well at each end of the ranges
Other conversions I have been able to select from similar ranged on tank gauges to again work well with factory wet fuel gauges.
Others have had half a dozen LEDs in a change over switch
Due to experience driving various LPG fields cars with a common ten LED gauge finding them unreliable as to remaining volume left in tank - I have done hated them with a passion.
So, I can't really explain why my most recent conversion I went with the despised LED bar, other than wanting to put a tacho in place of a wet fuel factory gauge
Talking to the manufacturer of these gauges I was now confident of its accuracy with my specific application.
Parked at night with the single orange LED lit, so things were getting close. Next mornings start, just the one red LED came on, no orange, so headed for a refill, up a slight incline after just half a mile and she sputtered and died.
So yeah accurate is nice.
But then over time I have run low, too low and had two green LEDs still showing.
I found to disconnect sender wire, LED gauge read full. Found a slightly loose 1/4" female spade connector at the tank. A quick squeeze to give best connection - the gauge has become reliable once again
