Next, estimate the number of hours the bulb is turned on each month. Step 5 - Multiply Your Quantity of Fixtures by the Wattage of Your Existing Fixture. Illume. How many watts is light bulb 120 VAC 60Hz 300mA? 0 1 2. An old fashioned incandescent light bulb, due to being a purely resistive load, has a power factor of 1.0. Explain in terms of the amount of current. We can calculate the power released in the bulb, and of the electrical system as a whole, by multiplying the voltage by the current. In fact, a 60-watt LED just may blind you. 89 Watts - 2'x2' -U-shape Lamp; 140 Watts - 2'x4'(3 Lamp) 178 Watts - 2'x4'(4 Lamp) 158 Watts - 8'(2 Lamp) 178 Watts - 8'(4 - 4' Lamps) By using the averages, we are able to get a good comparison against newer technologies with lower fixture wattages. Standard light bulbs come in a wide variety of brightnesses and wattages. 4.5 out of 5 stars 305. In other words, this isn’t about the physical size of the light bulb. It is impossible to convert watts to hertz, as the units measure different things. An incandescent lamp is an extremely inefficient light source. When replacing traditional incandescent or halogen light bulbs with a more energy efficient LED lighting system, it is important to understand the appropriate wattage equivalence for your light fixtures. Lumens and watts are important for determining light output and energy use. If the old lightbulb was a little too dim, they might opt for a higher-wattage bulb to improve the illumination. We'd also recommend replacing the lens gasket when replacing the bulb. By Staff Writer Last Updated Apr 15, 2020 3:48:34 PM ET. A watt measures how much electricity is being used by an item. This is about the highest safe wattage because the “safety” in question is preventing a fire. FREE Shipping on orders over \$25 shipped by Amazon.