Galileo Gravura Size vs. Lamp Chart
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* Means Backbox Required
| Medium (M) | Large (L) | X-Large (XL) | X-Large 1 (XL1) | X-Large 2 (XL2) | X-Large 3 (XL3) | |
| Width x Height x Depth | 8.25" x 11.125" x 4" | 8.25" x 13.25" x 4" | 8.25" x 16" x 4" | 9.25" x 21" x 5.5" | 12.25" x 26.25" x 7.25" | 14" x 41" 8.5" |
| Incandescent | (1) 60w | (1) 75w | (2) 40w | (2) 75w | (2) 100w | (2 or 3) 100w |
| Fluorescent Twin Tube | (1 or 2) 13w | (1 or 2) 13w | 18w | (2) 13w |18w | (3) 13w; *(2) 36w | 39w | (1, 2, or 3) 36w | 39w | 40w | 50w | 55w | (2, 3, or *4) 39w | 40w | 50w | 55w |
| Fluorescent Double Twin Tube | (1 or 2) 13w | (1 or 2) 26w | (2) 26w | (2) 26w | (4) 26w | (4) 26w |
| Fluorescent Triple Twin Tube | N/A | (1 or 2) 26w; (*2) 32w | 42w | (2) 26w | 32w; (1) 42w | 57w | (2) 32w | 42w | 57w; *(1) 70w | (3) 26w | 32w | 42w | 57w; (2) 70w | (3 or 4) 26w | 32w | 42w | 57w | 70w |
| T8 Bi-Pin Fluorescent | N/A | N/A | N/A | N/A | (1, 2, or 3) 17w | (1, 2, or 3) 25w |
| High Pressure Sodium | N/A | (*) 35w | 50w | 70w | (*) 35w | 50w | 70w | *(1) 35w | 50w | 70w | 100w | (1 or *2) 35w 50w | 70w | (1, 2) 35w | 50w | 70w |
| Metal Halide | N/A | (*) 50w | 70w | (*) 50w | 70w | (*) 50w | 70w | 100w | (1 or *2) 50w | 70w | (1 or 2) 50w | 70w | 100w |
| Metal Halide with Up or Downlight | N/A | N/A | N/A | N/A | PAR 20-35w or PAR 30-35 | 70w | PAR 30-35 | 70w or PAR 38-70w |
| Metal Halide with Option Backbox | N/A | N/A | N/A | N/A | PAR 20-35w; PAR 30-35 | 70w or PAR 38-70w | PAR 30-35 | 70w or PAR 38-70w |
| QL Induction | N/A | N/A | *55w | (*) 85w | (*) 85w | *(1 or 2) 85w |
| ICE Induction | N/A | N/A | N/A | N/A | (*) 70w | 100w | (*) 70w | 100w | 150w |