A heating padded enclosure would need to be raised off whatever surface you put it on to prevent warping anyways, so if we are just talking that the table/ shelf/ whatever is plywood it would be ok. I would be careful though, resins in wood such as pine can be dangerous to geckos in general. The UTH will come with little feet for lifting, or many people use stacks of cardboard pieces. UTH will be essential for night heating, belly heat is important for digestion.
As for daylight, you have hit on the grand argument of the internet. I did my own experiment and will never go back. I bought a visible spectrum with UVB light and tried it on a young gecko. Three days later he was eating far more and had more than double the energy. We have never used anything else since. Many people will argue that leos are nocturnal and don't need such light. I would guess they don't watch their geckos much. In the wild, leos hunt at dusk and dawn and DO get exposed to sunlight regularly. Our leos have always mimicked this activity by getting up a bit before "sundown," getting a drink and doing a few inspection laps to make sure their enclosure is secure. Our geckos will also sometimes sun, even just a tail, while they are asleep.
You will find conflicting opinions all over the internet, but I can tell you having taken our leo to the vet last week, the vet and the herp tech did backflips when they saw the picture of her setup and found out we use UV daylight. They both think it is very important and probably a good part of the reason our little girl isn't so little and very feisty even with egg problems.
In the end it is up to you. Good luck.
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0.1 Albino Leo Gecko
0.1 Crested Gecko
1.0 Dear Boyfriend
Departed: Harvey and Spock
