Watts from UVB light

[Dutchy88]

So I'm getting about 38c in the basking area and 26 at the cool end of my Pygmy dragon enclosure. I realize I need just a little bit more but I havnt yet put my UVB bulb in yet will this bring the temp up to it's required temp(depending on the wattage) or do I need a larger basking light (I currently have a 75 watt). Also at the highest point of the basking end reaches 40c any help appreciated just trying to get set up right.

 

[GeckoJosh]

If you use a 26watt UVB it should bump it up that extra couple of degrees, if not just go up to 100 watt