Animating Lights in Blender

 

https://docs.blender.org/manual/en/latest/render/lights/light_object.html

To save you from doing the conversion, here is a table of typical power values for point, spot, and area lights:

Real world light	Power	Suggested Light Type
Candle	0.05 W	Point
800 lm LED bulb	2.1 W	Point
1000 lm light bulb	2.9 W	Point
1500 lm PAR38 floodlight	4 W	Area, Disk
2500 lm fluorescent tube	4.5 W	Area, Rectangle
5000 lm car headlight	22 W	Spot, size 125 degrees

And a table of typical Strength values for sun lights:

Sun type	Strength
Clear sky	1000 W/m2
Cloudy sky	500 W/m2
Overcast sky	200 W/m2
Moonlight	0.001 W/m2

These values will likely produce much brighter or dimmer lights than you would expect, because our eyes adapt while a render engine does not. So to compensate, adjust the Exposure in Render ‣ Film.

To get realistic results, remember to also set the light size and color to realistic values. The color of your lights will also influence how bright they appear to the human visual system. If you leave the power unchanged, a green light will seem the brightest, red darker and blue the darkest. Thus you might want to manually compensate for these perceived differences.