I am using the LumensFactory Stinger LED upgrade bulb in an old 1990's Stinger light that was originally incandescent. The beam is outstanding but it does not have much throw. $48.
Lumensfactory also makes an upgrade for the TL-2. The TL-2 LED $38.
(Not compatible with TL-2 X). Not sure which one you have.
Look hard at the cost of upgrades. You may find a new light for just a bit more especially if you also need a new battery. Take the Stinger. You probably already have the charger so buying just a new light only (which comes with a new battery) may be in your best interest. A battery alone is $16.
$16 + $48 = $64. Add another $20-$30 and you can buy a new light.
A couple of good reliable lights on the night shift are important and will be used heavily.
Take a look at Lumensfactory.com
Under Online Shop, Lamp Modules, Streamlight. It is a great company with excellent customer service.