Those lumies can be found on eBay really cheaply btw.

I had a basic lumie sunrise alarm for around 15 years, so t worked without fault but ultimately ate bulbs (filament style). I changed to a Philips one with an LED which is not replaceable and will work for the lifetime of the unit, approx 10000 hours. My rough calculations of an hour per day of use of the led will mean it lasts 27 years which is good enough for me.