Is there a better way to sample LEDs?

Come to my house if you want a sampler!

BUT, like mentioned earlier, go to the Convoy store and buy different LED flashlights at a reasonable price. And even better, start modding your own flashlights to experience the variety of LEDs that are available.

Totally agree with above but my sampler is the S21A where I enjoy the 20mm MCPCB with more solder pads (over the 16mm), better isolation between the reflector and solder pads (usually prefer a TIR) and the 21700 battery (you could still use an 18650).