A fluorescent tube that is failed or failing usually has darkened areas near one or both ends of the tube.
Build your own fluorescent light fixture.
This guide shows how to build a system that will fit for almost any growing needs indoors.
This is great fixture for growing plants.
For t5 s and pc bulbs the wattages are basically equivalent.
Locate a ballast as i mentioned above i have been recently experimenting with using spiral cfl ballasts to power other bulbs.
Each letter will be constructed of 4 lights.
Build a customized fluorescent lamp system t5 when growing seedlings and plants in the vegetative stage using fluorescents is a great way to provide the beloved plants with bright and balanced light.
Now for building your own fixture.
You need to buy a spiral cfl with the proper wattage you want.
To replace remove the old tube and bring it to the hardware store.
I want to use bulbs that are 2 4 feet long or what ever is easiest.
Or you can read the printing on the tube to identify the correct replacement type.
A burnt out lamp is the most common reason any light fixture does not light.
From scratch without buying light fixtures and taking them apart.