I carry lasers in most of my personal firearms and I keep a large assortment of laser equipped firearms set up for students to try out
The Crimson Trace LG-350 is available in a Red or a Green laser. If all you are interested is a red laser, Crimson Trace has 3 additional J-frame models, the Lg-105(LG-105P), LG-305 and the LG-405
You do not mention what firearm you are putting these on, what kind of condition your vision is in or how you intend to carry the firearm.
All of these factors need to be considered if you are asking for a recommendation
If you need absolute compactness, the Crimson Trace Lg-105(LG-105P) is the smallest option
With any of the J-Magnum revolvers or the PC 940 Special, firing full power ammunition, the LG-405 or the Hogue will help you handle the recoil with their extra rubber and grip size .
On a steel framed revolver only shooting 32 or 38 ammunition the choice is open to almost anything.
If you are going to use a leather holster with the Hogues, it need to be checked for clearance of the laser. With the module sitting so far forward, I have seen some clearance issues
If you have bad eyesight, the Hogue with it's laser in blink mode it is much easier to acquire. The Hogue laser can be put in constant on mode, blinking mode and stealth mode. Stealth mode blinks 3 times and stops until you release and reapply pressure to the switch
The CT L-350G has a Green laser which is MUCH better in daylight situations as the human sees this color as being brighter than the red