Hi Ann,
I'm sorry to hear that Turbo is sleeping a lot again.
Could I ask what wattage your dual purpose light is (I assume this is a mercury vapour heat/light/uvb bulb)? You really shouldn't need a UVB strip if you have that, as it should be bright enough, and the strips don't give off a very bright light anyway. I think what could be more important is the temperature. What is the temperature directly below your light, at the height of your tortoise's shell? I know I asked this previously, but depending on the temperature in the room, the temperature in the tortoise table will be very different. If temperature in the room is warmer, like on a warm day, then you might need to reduce the temperature in the table, as if it is too hot the tortoise will also sleep a lot.
You could try some extra light in the table, of course, as a bright light does make a huge difference to the tortoise, but before you buy an expensive strip light, and the starter unit and reflector that need to go with it, maybe just try something like one of those bendy desk lamps hooked over the side with the light directed into the table, or some sort of other light hanging above as I'm not convinced that lack of light is the cause of your tortoise's sleepiness.
If you do want to buy lighting and other equipment, you could try somewhere like Swell Reptiles
https://www.reptiles.swelluk.com/reptil ... le-lights/ as they are sometimes cheaper, but if you have a Pets at Home or a Reptile Shop near you then you won't have to pay for postage. If you do get a UVB strip then it is important that you also get a clip-on reflector to protect your eyes, because looking directly into the light can damage your sight.
When it is nice and warm out, do you have the facility to take Turbo outside? The natural sunlight has a much higher quality UVB than we can provide, and they do love it outdoors. If you can be outside in a t-shirt then Turbo can be out, and even if it is a bit cooler you can put him out for a while, and when his shell starts to feel less warm then you can bring him in for a warm up and then put him out again, but do supervise him as they are great escape artists.
Also, I know it sounds odd to say, but tortoises do get bored if they are in the same environment all of the time, so you could also try putting more 'furniture' in his table -- a nice big rock that he has to walk around, or something like one of those bendy log thingys (I think they call them 'fiddle sticks' that he could use as a tunnel or climb up and slide down the other side (they love those), or just make some of his substrate into a nice hill in the middle -- just stuff to break up the sight lines and give him something new to explore.
Nina