Calculate a measurement in lumen to a measurement in candela (cd). The candela takes the radiation angle into account, which is measured in steradians (sr). The steradian is the SI unit for a solid angle and is equal to 1/4 pi of the entire sphere. A lumen is equal to 1 candela x steradian.
Jamaica's exchange rate of $93.80 to US$1 may seem high, but there are many countries with higher exchange rates. Guyana's currency is the weakest in the Caribbean at $203.45 to US$1. In spite of this, their economy grew by 5.4 per cent in 2011. Comparatively, Iran has the highest exchange rate in the world of $24,551 to US$1, followed by Somalia $23,000 to US$1, then Vietnam third with an exchange rate of $20,875 to US$1.
If you pay in US dollars it is best to pay the exact amount or to use $US1 or $US5 bills (aka banknotes). If you pay in any currency other than Jamaican dollars and the change is given in Jamaican dollars the hotel or shop will set the exchange rate and the rate will normally be to the advantage of the merchant.