SLA printers and curing devices are technologies that generally require high energy consumption in production processes. The energy efficiency of these devices is a critical factor for sustainable manufacturing and cost optimization. In this study, the energy consumption and hardness properties of resin-based samples produced using the SLA (Stereolithography) method were examined in relation to curing time. The relationship between curing time, its effect on the samples’ hardness values, and energy consumption was evaluated using a 36 W UV curing device. Energy consumption was recorded over different curing times, and this consumption was compared with the energy values calculated for each time period. The energy consumption was calculated by considering the power of the device and the curing time. The results indicated a noticeable increase in hardness values as curing time increased, but it was found that this increase stabilized after 47 min. However, the increase in energy consumption continued despite the saturation point in hardness, highlighting that further curing time was unnecessary from an energy efficiency perspective. During the curing process, it was observed that the devices operated at approximately 36 W of power, consuming 4.5 Wh of energy every 15 min. This led to 28.2 Wh of energy consumption for a 47-min curing time and 37.2 Wh for a 62-min curing time. These values demonstrate that additional curing times, which do not result in significant improvements in hardness, lead to unnecessary energy consumption, emphasizing the need for optimization in terms of energy efficiency.