Help with a tac light

[Dishonored]

Hey guys I bought a UTG tac light about a year back maybe a little less. It is the 15 lumen (EL228) came with the handheld setup and a "kit" to mount it on a piccatiny rail. It was working fine the other night when I was searching for my dog. I grabbed it last night and it was really dim so I replaced the batteries with some streamlight ones I had bought for it not knowing it came with it's own. Now it is brighter but no where near as bright as it was before. What could be wrong?

 

[Guate_shooter]

Prob burnt LED's they are of quality per say

 

[Dishonored]

Thanks man it does run off of a led IRB.
I will most likely just buy a name brand one this go round. I cant find my receipt so this one is most likely a lost cause.

 

[rt2carry]

I just got a fenix pd22 as my EDC. Very impressive light for the size 3.5 inches and 190 lumens. I haven't researched if they make a weapon light line also but the quality is in this little powerhouse of a light for sure and its only $60.

 

[Dishonored]

I'm sorry lsp typing error on my behalf. It is a 150lumen. And thanks for the info.