Cross Reference
| Manufacturer | Ordering Abbreviation | Part Number | 
| GE | MVR400/U/ED28 | 18904 | 
| Osram Sylvania | M400/U/BT28 | 64488 | 
| Philips | MH400/U/ED28 | 27862-2 | 
| Class | UMH Series | 
|---|---|
| Lamp Type | Metal Halide | 
| Ordering Abbreviation | UMH-400/U, ED28 | 
| ANSI Spec No | M59/E | 
| Wattage (W) | 400 | 
| Bulb Type | ED28 | 
| Base Type | Mogul (E39) | 
| Initial Lumens (lm) | 34000 | 
| Mean Lumens (lm) | 22000 | 
| Lamp Life (Hrs) | 20000 | 
| Case Pack (Qt.) | 6 | 
| Lamp Finish | Clear | 
| Operating Position | Universal | 
| Color Rendering Index | 70 | 
| Color Temperature (K) | 4000 | 
| Max. Overall Length (In.) | 8.31 | 
| Light Center Length (In.) | 5.00 |