GENorkus wrote:
It really doesn't mater which flashlight you use, just remember it takes more or less time to properly shine it.
A weaker light takes longer, a stronger light is quicker. Just like using the output settings on most strobes and flashes.
That is true to an extent. But if you are photographing stars, exposure times need to be kept to 40 seconds or less, depending on what focal length lens you are using. Unless you have lots of help, you need a source that can supply the needed light in just a couple of seconds in order to have time for everything else that has to be done in that short window.
And you need light at a similar color temperature to what you are using for the celestial part of the frame, which is generally between 4000K and 5600K most of the time.