You have seen corn cob LED lamps, but how about an HID LED replacement in a clear filament style bulb? TCP has designed these lamps with the same ED17, ED23, and ED28 ANSI base to ensure they will fit in existing fixtures. Better yet, they reach up to 200 lumens per watt and are available in 2200K, 4000K or 5000K colors! Now they carry an ED37 shape as well that can replace up to 400W metal halides. Who knows what will be up next, maybe BT56?!