Lighting

[Lija]

You need to look how they live in a wild - By the big ponds, swamps under the bright sun = full spectrum lightening is the best. However, nobody tested scientifically on how different spectrum lights influence the development and in fact MBD in African bullfrogs is rare, but not impossible, people are getting good results without special lights, but with food supplementation.
The best for you is to use proper supplements ( ca with vitD3, multivitamins) and full spectrum lights.