The Feelux LSL535K120V is a 5 watt 3500K LED fixture. The fixture is a very compact 11.61 x 0.89 x 1.48 inches. The LSL535120V is 3500K which is soft white light. The fixture can be linked to others for a maximum of 400watts using the proper connecting cables. The LSL535120V can replace the Hera ES12SW/BC or ES13SW/BC or the Feelux NSL8W35K120VC or NDL7/35K fluorescent fixture saving 7 watts and the LSL535K120V has a considerably longer life of 40,000 hours.