Low-light camera is a special kind of detector which is capable of detecting weak signal down to a few photons or even single photon. Low-light camera is an essential element in super-resolution localization microscopy, because the latter requires detection of the weak fluorescence from single molecules. Currently, there are several types of widely-used low-light cameras which are commercially available in the market. For each type of low-light cameras, tens of products from different manufacturers are available with different performance and prices. Therefore, choosing an appropriate low-light camera for localization microscopy is always time-consuming and sometimes confusing. In this work, we will firstly discuss the principle of localization microscopy, and the performance requirements of low-light cameras in this new technique. Then, we will present a brief explanation on the key parameters for determining the imaging performance of low-light cameras, and explain how to assess the imaging performance of low-light cameras both experimentally and theoretically. Finally, we will show the imaging performance of a new type of low-light cameras called sCMOS in localization microscopy. We hope to convince the readers that EMCCD is not always the best and/or only camera choice in localization microscopy, and argue that the most appropriate choice of camera depends on the application scenario and necessitates a deeper look at cameras beyond typical specifications.