Excuse me, how many W bulbs is a strong flashlight 654.38+ million lumens? How many lumens is a 3W light bulb?

The maximum luminous efficiency of a strong flashlight is about 50mA per watt of LED with 1 16 lumens, and 3W is slightly better (such as R5 of Cree) with about 350 lumens.

When 1 lumen is equal to 540 THz (540 THz or 5.40 x 10 Hz), the radiated electromagnetic energy (EM) is1.46mw (1.46x10-3w). In the basic unit of SI, 1 lumen is equal to the cubic power of 0.00146kg/m2 per second (1.46x10kg multiplied by m/sec).

Extended data:

A 40-watt ordinary incandescent bulb has a luminous efficiency of about 10 lumens per watt, so it can emit about 400 lumens. The luminous flux reflects the intensity of visual reaction produced by light source radiation in unit time.

The unit of projector luminous flux is ANSI lumens, which is the standard for measuring projector luminous flux formulated by American National Standardization Association. It measures the illuminance of each point at the nine intersections of the screen "sky" shape, multiplies it by the area, and then finds the average of the nine points.

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