Parkinson's disease is a progressive nervous system disorder that can cause tremors in the hands and arms, rigid muscles and speech changes such as slurring, according to the Mayo Clinic. â
Electric power law: P = V x I   P = power in watts   Einstein's law: E â¦ = m x cÂ²   E = energy in joules, m = mass in kilograms, and c is the speed of light.
Watts to lumens calculation formula. The luminous flux Ï V in lumens (lm) is equal to the power P in watts (W), times the luminous efficacy Î· in lumens per watt (lm/W): Ï V(lm) = P (W) Ã Î· (lm/W).