first one: out of the 3 this is the stronger one. good in dark place, big inserts (matching the color)
second one: this is normal led one led not too strong, perfect for small inserts (but not strong enough if you match the color insert, small white insert will work). will work for g.i but not in dark area.
thrid one: 3 leds, i love this one, goes everywhere g.i, inserts and will be perfect when matching colored inserts.
thats how i use those.
don't forget in the end it's all up to you what will work for you is what matters!