My new lamps are metal halide. I have them fairly high above the plants, but I will take Kipp's advice and stretch a shade cloth between the light and the plants. Many of the plants are young seedlings and thus more sensitive to burning. Jane McGary On 11/5/2015 11:28 AM, Kipp McMichael wrote: > 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 >