100 Meters, 10Gb SFP+ to RJ45 Modules, 1G/2.5G/5G/10GBase-T Ethernet Copper to SFP+ Transceiver for Ubiquiti UF-RJ45-10G, Plugin 10Gb SFP+ Port, Very Low Power Consumption

I have 4 of these 10gbe 100m adapter in my switch side by side. They get warm but nothing concerning even during a 30hr sync. I have tried the other ones, 80m and Cisco 80/100m. The ubiquiti 100m seems to run the coolest with cisco 100m being a close second. My original plan was to mount a small blower fan but it was never needed.