These LED BR30/BR40 5000K daylight retrofit light bulbs are the best energy savings option on the market today. You can replace your old compact fluorescent plug in style light bulbs to get better lighting, reduced your replacement costs, and save energy at the same time. They come in two styles which are plug & play (works with existing ballast) and direct wire (no ballast required). We offer these in many different colors temperatures (Kelvin) so they can be used in many different lighting applications.