I've had the same twice with them. I have purchased hundreds of pounds worth of stuff from them when I first moved in to my home in 2013, and sent the registration forms for all of the items that qualified but of course never got any confirmation until I needed to ask for replacements...
To me the extended warranty thing is almost like a scam, there’s no proof for the customer to confirm whether it is registered correctly until they need it only to be told it’s expired. Why can’t they just make all lumilife 5 years automatically?! The fact that you have 5 years warranty as a permanent tag on their website and one of the first things that people see on the site borders misrep in my views. Most brands will simply not require a warranty registration as long as you can produce the proof of purchase, and warranty would be automatic, why advertise 5 years when you actually try to get out of offering it by placing the burden of getting it registered on the customer to have to read the small prints, fill out a stupid form, pay postage to send it REGISTERED before it’s guaranteed to activate…?! (I'm only guessing sending by registered will get somewhere, but who knows, you'll still need to dig out that post office receipt when you need to claim after say 3 years...) That’s enough reason for me to look elsewhere to be honest and not recommend LED hut.
I did recommend LED hut to a few friends a couple years back, but now have stopped as 1 of them had also had the same experience, getting bulb replacement refused because customer service is uninterested in replacing a £2.50 bulb and reply with a standard go to our returns page email, which I did but the site of course says my warranty has expired and we never hear from them again…