When you Received the light bulb and check whether it can light up, if not, please check your lamp holder, or replace the lamp holder with a new one,  most bulbs that cannot light up are due to the light base not adapting the lamp holder. Every bulbs are checked carefully before shiping.Thanks      

Compact Full Spectrum Lamp 10.0 UVB 26 Watt
10.0 Compact UVB Desert Terrarium Lamp.
Ideal for all desert dwelling reptiles.
Ultra High UVB + UVA output.
Effective up to 50 cm (20"").
Provides necessary UVB rays for optimal calcium metabolism.
Recommended in combination with 3.0 UVB lamp for a higher visual light and heat output.

A 10.0 UVB compact lamp has a very high UVB output similar to that associated with desert environments.
This lamp can also be used on screened terrariums or terrariums with dense screen covers to ensure UVB penetration.
Dense screens can filter out up to 50% of the UVB rays.

Fluorescent lamps lose their UV radiation and approximately 50% of their lighting output quality within one year.
Changing your terrarium lamps regularly ensures optimal light conditions and UV radiation to keep your reptiles healthy.

It is recommended to combine a high UVB output (5.0 UVB and 10.0 UVB) with a very high visual light output (2.0 UVB) for optimal results.

>3.0 has high Color Rendering Index and High visual light output; Ideal spectrum for all reptiles andj amphibians
>5.0 has high UVB output.Effective up to 30cm. Especially for JUNGLE
>10.0 has ultra high UVB output. Effective up to 50cm. Especially for DESERT

Fluorescent lamps do not provide sufficient heat for your animal by themselves.
A separate heat source is required in addition (eg: incandescent basking lamp).

A regular screw fitting is sufficient to operate these lamps.

Base: E27
Voltage: 220V~240V
30% UVA + 10% UVB, and 60% of visible light output.
Rated at 26W 10.0
Recommended for desert dwelling reptiles
Built in ballast
Compact energy efficient lamp