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Use of IC Buck-Boost drivers in automotive LED lighting projects Answered

I've been contemplating the use of high power amber or yellow LEDs in a low cost automotive warning system (think tow truck).  However, car electrical systems are not set at 12v.  They can range from 9 to 19v with spikes up to 70v. 

To protect the components I would need more than just a current limiting resister.  Under those conditions they would need a buck-boost driver.  Unfortunately I'm new to ICs/power LEDa and not sure where to start. 

I was hoping someone would be able to help me out with further guidance.  I




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