Thx for the ideas still anoyed the guy I was talking to told me wrong he,also told me I needed a 100 watt infa red bulb that wrong too
Jason ~
You are definitely welcome.
Don't be too quick to assume that everything the breeder told you was wrong. I heat my 20 gallon long leopard gecko tank only with overhead lighting. Right now a 60 watt Zoo Med Nightlight Red Reptile Bulb is providing all the daytime heat, but every day the maximum temperature seems to fall about a degree

(). At first this bulb held in the low 90s, but today it is only 88 F. Daytime temperature in the room is always 70 F.
I do have a 100 watt Ceramic Heat Emitter and a dimmer for that ready to step in at a moment's notice. The 60 watt Ceramic Heat Emitter I had needed to be returned because it literally put out only 3 or so more degrees than the 30 watt CHEs which I have. The whole lighting/heating is on a timer.
Because of the height of your 40 gallon breeder tank, you may very well need some overhead lighting to boost the UTH. You are just going to have to play around with things till you get it right. I would expect that you get most of the heat from your UTH!
Be aware that using UTHs is more efficient electrically.
Another thing you can do which will assist your leos in thermoregulating, is to build a series of ramps and ledges easy for leopard geckos to reach.