Trouble is, most lights these days aren’t single mode. Because the output of them means having multiple modes is required to allow you to use them close up and for distance. And to regulate heat.
That said, if you want single mode, it can be done quite easily, but you’ll probably be required to solder.
As for zoomies. Well the Zuesray from Dealmetic has been very popular.
Review here: Review: Zeusray FL05518 Domed & De-Domed
Main thread for the Zeusray: trying to consolidate all ZeusRay posts
NOTE: There is new version just out called the EDC120. I’ve not tried one, but hoping to get one to review soon. I have 2 of the regular Zeusrays (as per the review) and they have been nothing short of brilliant. Even more so when you consider the price.
They are multi mode, but so long as you leave it off for a few seconds, they come back on in high. So unless you are turning it on/off with say less than 5-10 sec interval. It will appear to work as a single mode light.