I have used a Maglite XL100 & XL200, both run on 3 AAA batteries, are under $50. Both have various functions including an adjustable Strobe, brightness settings, etc. it has done the job for me all these years.
I would highly recommend watching this video if you have not before
https://www.youtube.com/watch?v=V78tH6aVpuM
It is a really good insight into flashlights.