Fenix TK series has a lot to offer. I have used my TK-11 on a daily basis for over two years. I use rechargeable Tenergy batteries that last ten hours in bright mode(255 lumens). IIRC it set me back about seventy dollars.
My girls would steal my SureFire G2s to go “tunnel rat” for their ferrets under their beds, and they’d leave them on, wasting $5 worth of Surefire 123 batteries every time. I picked up a dozen of the Tenergy rechargeables and they work great.