Dragons do not usually jump at light bars and I am assuming that is a UVB long tube fixture your talking about? Something was off in that tank for a dragon to be doing that-With the light bars I see posts all the time about how their beardie jumped and broke it, If the bars werent 100+ dollars and didnt have to be jimmy rigged inside of a tank I might do it, still might do it just to be safe but too broke for now.