Yes.. its perfectly normal for when VM have issued an older refurbished Hub3 as new ones and newer Hubs are in short supply !
That's because the 1p LED in it fades/fails over time - but it has no impact (or is indicative at all of any failing performance).
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John
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I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired, 1 WiFi, 1 on PA) Hub5 in modem mode with Apple Airport Extreme Router +2 Airport Express's. On 250Mbps, Talk Anytime Phone, x2 Mobile SIM only iPhones.