40 Watt ED28 High Lumen 120-277V LED Filament Bulb – Green Electrical Supply
STANDARD PRODUCTS MH400W/U/ED28 HID Light Bulbs | WESCO Canada
GE Lighting HR250DX37 | Mercury Vapor Lamp Ed28 250w | 2V449 | Raptor Supplies United Kingdom
Satco s4237 175w ED28 3700K Metal Halide HID Bulb [Price Match Guarantee] | Lumenco.ca
ProLume Metal Halide ED28 Bulb, 175 Watts, 4000K | Winsupply
Plusrite 1022 MH400/ED28/U/4K Lamp – Lighting Supply Guy
Westinghouse 5225000 Clear 32 Watt ED28 Mogul LED Bulb - 5000 Lumens, 5000K, and 80CRI - LightingDirect.com
Feit Electric 400-Watt ED28 Shape Clear Metal Halide High Intensity Discharge E39 Mogul Base HID Light Bulb (1-Bulb) MH400/U/ED28/HDRP - The Home Depot
Satco S5832 4200K 100-Watt Clear Universal Mount Mogul Base ED28 Metal Halide Lamp : Amazon.co.uk: Lighting