think we talked before about heating and the same will apply for your new larger tank. I use a red bulb 24/7 sitting on top the tank at one end. If your tank is a tall one(hopefully) you should be able to use a 60 watt bulb and if its not very high probaly a 40 watt. I use some kind of decor in that corner up high(hanging plastic plants) which allows the tokays to hide out close to the heat. I have never worried about the temp at the bottom of the tank because the Tokays hang out on the glass up high and sit where the temp is comfortable to them. the red reptile light will aloow you to veiw their activity at night and not bother them.
I'm not sur what type of lid you are using but basically you will need to modify it so you can run the waterfall pump cord up one of the back corners and out. you may need to cut out a small corner or male a hole large enough to run the cord out. Be carefull when you do the and don't make the hole/opening any larger than you need so you can prevent the Tokays from squeezing out. you can use a little tape or something to seal up the opening, really depends on your top and how you do it. Heres a pic shown many times just to give you a idea of what I use, there are many different ways you can set up and work well but you can see the basic light set up that has worked well. BTW, i used to use a waterfall but dont any more, Tokays constantly pottied in it and it made a very good hideout for uneaten crickets who actually breeded under and behind it, if you have one though give it a try they do look nice.
good luck

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My posts and replies are my experiences only
1.2.15 Tokays
1.4.10 Leos(13 albino)
1.2.0 AFT's(amel male)
0.2.0 Stenodactylus Petrii(Dune Geckos)