Lights for your plants (Seaside BN22)

I’ve had this unit since 2020 and I’ve used it successfully to start most of my allotment and garden veg and flowers.
It appears that the bulbs seem to have a shelf life of about 5 years as all of them have died since last summer- I replace 2 and the other 2 stopped working so I’m pretty frustrated.

I’m trying out some LEDS now- I’m rubbish with changing these bulbs anyway.

The cable’s about 2.5meters long.
It would be a shame to scrap it although it will recycle well.