555 Low Cycle Pulse

Looks good in the simulator. 1% duty cycle pulse. Would like to use something like this to switch my 12v input with NPN transistor at 10ma instead of the current setup taking me 45ma with the led backlight display control module.

Does anyone have good experience with a 555 timer? Is it really this simple? Can one be operated in this mode? I simply added a blocking diode for discharge cycle. And plugged in calculated values to get around the frequency i'm looking for.

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