I have just got a juvenile bearded dragon yesterday. I have been reading up lots but wanted to check I have the basking light bulb correct or if need a stronger wattage. I have a vivarium that is L44 x D20 x H15 inches and i think 57 gallons. It was second hand and already had the basking set up with it. The bulb currently in it is a pro rep 60W one. When i put a thermometer directly underneath it on the raised log where my beardie basks it does get to a temp of around 35°C or slightly over even but when its down on the substrate nearby its at about 32°C. Is this warm enough or should i upgrade it to a 100W?