With a lot of shaded cover the lights probably won't do any harm. Fluorescents are always so bright especially those meant for plant growth. There are daylight blue bulbs available in incandescents. Exo terra makes one and I believe they also make a natural bulb. Ofcourse these are all UVA bulbs. A lot of people believe that its the UVA and UVB rays that damage the frogs eyes which is quite possible in much stronger brighter bulbs. If you are able to adjust the amount of light output coming from the bulb then there will be no issue. That's what hurts their eyes bulbs that are too bright. I don't have any links to post but I may be able to get names I believe the daylight bulb is actually called Daylight blue and the other is nature sun. I believe these both work well with plants. Ofcourse when it comes to plants fluorescents tend to do a better job. The daylight blue bulb does emmit farely decent heat as well as light. Its a white light. Stimulates plant growth. Look them up and see what one best suits you. Also its wouldn't hurt to buy a lamp with a dimmer switch as these bulbs release more heat than fluorescents and if you aren't having trouble keeping your frogs warm enough then these may make them too hot.