BRIGHTNESS:: That's it! The LEFT bulb is Alla LED bulbs. The correct LED bulb are my previous bulbs which I thought were bright. Flashing in unison or in sync: The reason I bought these Alla bulbs is to replace the ones I have which often flash out of sync and sometimes seem to flash left, right, left and then constantly. I hope they don't do the same without trying to get stopped by the police. You will notice from the photos that these bulbs are larger because the projector lens is larger, making them brighter than others. Make sure your lenses have room for these longer bulbs as I read in a previously posted review. So far I'm happy with my new purchase and can't wait to see it in the dark. My videos show the difference in lighting compared to others. Hope this review helps.
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