Which LED bulb will fit this 4x battery (D size) Maglite FlashLight?

One battery size D = 1.5V.

4 batteries size D is 1.5V x 4,we usually suggest customer buy our 6V lamp or 3-18V or 5-24V lamps.Before buy,pls confirm the socket and polarity first.If need AC bulb,pls contact me first.Because most of our bulbs are with DC voltage.

Below one is with wide voltage 6-30V,it is compatible with 6V,12V,18V,24V flashlight.High brightness and lumen.