This is an LSE Lighting replacement UV bulb – compatible with model 05-0010-R and GPH450T5L/4.

It's a 4-pin base, tube-shaped, glass bulb that emits 254nm UV-C light – the kind that kills germs and bacteria.
The light color is 254NM, and it has a clear glass finish.

This bulb is made in the United States, so quality is solid.

It's rated for 10,000 life hours – that's a long time before you need to replace it.
Great for use in water purification systems, air scrubbers, or any UV sterilization unit that takes this type of lamp.
The brand is LSE Lighting, a known manufacturer of compatible UV bulbs.

This is a direct replacement – no modifications needed.
Just pop out the old one and insert this.
It's brand new, in the original packaging.
The bulb shape code is Tube, and it's a standard size.
If your UV system isn't working as effectively, the bulb is likely near end-of-life – swapping it restores full germicidal power.
It's a critical part for clean water and clean air.
Long life, reliable, and effective.
Get this bulb and keep your system running at peak performance.

Simple, effective, and made to last.