Network Hubs & Switches
HPE J4858C HP ProCurve Gigabit-SX-LC Network Interface Card
Wavelength: 1310nm Power Consumption: < 500mW Typical SMF, 850nm, 550m, LC 1000Base-SX SFP Transceiver SFP-Gigabit-SX-LC fiber optic transceiver Power consumption is 0.8 watts typical with 1 watt maximum at 100% Utilisation
https://www.bizrate.co.uk/networkhubs_switches/hpe-j4858c-hp-procurve-gigabit-sx-lc-oid1664151569.html