Review on Simpo Horizontal Replacement Downlight 6000 6500K: Brilliantly Brightening your Space by Sandy Taylor

These bulbs are very loose compared to my 7W PL-S fluorescent bulbs. You have to wiggle them in the plug to make them light up and work, and just hope they stay. I just measured the square plastic base on both lamps that fit in the socket. The new replacement LED bulb is 0.51" wide and 0.50" deep. The old original fluorescent base is 0.525" wide and 0.62" deep. No wonder they hang out at my outlet. Bad quality control. I'll keep going and see if they work.