I think you will find that a thick acrylic would be sourceable and more affordable

This explanation may help, Source: https://www.renovatorstore.com.au/blog/lighting-and-power-in-your-bathroom-the-simple-rules-to-be-safe/ REQUIREMENTS Zone 0: Inside the bath or shower. Any Lighting used here must have a minimum rating of IP67 (protected against immersion in water) Zone 1: Above the bath or shower to a height of 2.25m. A minimum rating of IP44 is required Zone 2: The area stretching to 0.6m outside the bath or shower and above the bath or shower if over 2.25m. An IP rating of at least IP44 is required Outside Zone: Anywhere outside zones 0, 1 & 2. Where water jets are not to be used for cleaning purposes, the general rules of BS7671 apply In addition to the above, if there is a likelihood of water jets being used for cleaning purpose in zones 1 and 2 a fitting rated a minimum IP65 must be used. Now that this has been explained, always make sure to purchase bathroom lighting according to these standards to make sure that your bathroom is always safe. You should also have this principle applied when you purchase other electrical devices such as heated towel rails, or a guide to where you'd put sockets in your bath for razors and other devices. This may also fix the common misconception that LED lights are not rated for bathrooms. Typical LED lights have an IP rating of IP66 which is more than the needed IP rating standard that bathrooms should have. - Not to mention you'd be saving a whole lot from energy bills in the long run.

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Bathroom renos can be daunting as there are many things to consider and usually the space can be limiting. Free standing baths are stunning and come in many shapes and sizes. You have mentioned that you and the boys will use the bath, ensure you factor in the "users" height as this will determine the bath size and depth. Firstly is the plumbing remaining in the same position? Floor mounted bath mixers can be installed with a concealed under floor box or the above floor connection method. The concealed box method is advisable before the flooring is installed, and has the benefit of a lower profile floor plate, which is preferred. The above floor method may be done where the first approach is not possible. Free standing bath mixers visually create an impact when paired with the freestanding tub, ensure you have enough room around the tub as it will be difficult to clean if it sits too close to walls and or vanities etc..many freestanding bath mixers offer functional hand showers as well as the spout, ideal for washing soap out of kids hair. Would love to see a lay out of your bathroom to assist with tap ware placement. Good luck with your bathroom renovations, always happy to assist you. Carmen Collaborative Interiors