Oz Purple Night Heat & Light Globe – Small 40 watt. NEW type that now come in five different wattages (40, 60, 75, 100 and 150 watt). Improved quality incandescents that come individually packaged in foam boxes inside brightly updated packaging. The small Oz Purple heat and light globes are nocturnal heat lamps that are suitable for viewing the reptiles natural habits at night as well as providing heat to bask under. These incandescent globes are ES.