Jane, I assume your new fixtures are a metal halide or high pressure sodium. These are indeed strong lights and can burn even full sun-loving plants. I would suggest shading with cloth or placing more sensitive plants outside the "cone" of light directly beneath the fixtures. Just to note: If you lights are still fluorescents then they are unlikely to burn anything unless the bulbs are within inches of the plants. -|<ipp > I recently replaced the common sort of lamp with a modern > fixture intended for growing plants, purchased from a neighbor who is > closing down his indoor growing now that his "crop" is legal in shops > here in Oregon.