My personal experience with heat lamps has been that they're just a nuisance to deal with if you can avoid it, or unless dry conditions are desired.
They make humidity significantly harder to maintain, and they seem to be far more prone to malfunction than the heat pads.
Essential equipment basically boils down to:
Heat source (preferably UTH)
Thermostat
Thermometer (2)
Hygrometer
A lot of people here like Accu-rite thermometer/hygrometer units from Walmart cause they're cheap and they work well enough, and they cover two pieces of equipment in one. I can't get them here though, so I went with the next recommendation which is cheap aquarium/terrarium thermometers and an analog hygrometer sold for cigars. So far I've found all my equipment measures within its margin of error, so no complaints.
For thermostats, a lot of people feel the hydrofarm units are probably the cheapest but still adequate option.
Loose rule of thumb for heat pads is approximately 1/3 of the bottom.
For humidity on tanks like yours a lot of people seem to like the solution of putting a damp towel over most of the top. No personal experience or comments.
EDIT: Too slow
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