IDEA: shortcut to specific brightness

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I really like smooth ramping but even more to know how long my flashlight will last on a charge. Why not both? It would be quite helpful if you could input a number between 1 and 150 to set a very specific brightness with a known power draw. You could test runtimes on certain levels and when out and about take a good guess on runtime remaining based on voltage and your exactly set brightness. I know about manual memory but find it too limited.