This is a vapor tight ceiling fixture with a set of 2 LED T8 24 Watt Bulbs included (48w total). These LEDs are 30% brighter than the standard 18 Watt LED bulbs. This fixture requires no assembly or modifications. All of the necessary modifications have been completed. These bulbs work as an Eco-friendly and cost efficient replacement for (4) 32 – 48 Watt (128w – 192w Total) Fluorescent T8 bulbs. Very bright and energy efficient. Creates little heat and no UV or IR light radiation. Bulbs rated for 50,000 hours of use. Chip Model: SMD2835. Water-resistant light fixture, good for both indoor and outdoor usage. No ballast needed.