You need to buy a spiral cfl with the proper wattage you want.
Build your own fluorescent light fixture.
Each letter will be constructed of 4 lights.
To replace remove the old tube and bring it to the hardware store.
A burnt out lamp is the most common reason any light fixture does not light.
Or you can read the printing on the tube to identify the correct replacement type.
A fluorescent tube that is failed or failing usually has darkened areas near one or both ends of the tube.
This greatly decreases the cost of the fixture.
I want to build several letters out of fluorescent light bulbs for example one letter is o but it will look more like.
I want to use bulbs that are 2 4 feet long or what ever is easiest.
This is great fixture for growing plants.
Just attach the bulb ballasts plug it in.
For t5 s and pc bulbs the wattages are basically equivalent.
From scratch without buying light fixtures and taking them apart.
This guide shows how to build a system that will fit for almost any growing needs indoors.