Cover reduce light?

[serratus]

"fish that are known to be prone to jumping or attempting escape from their glass prison"

Of the commonly kept reef safe fish, which ones are known to be prone to jump out of the tank?

Also, without a cover and with the light fixture raised on legs (TEK fixture), would you recommend using a splash shield to prevent salt buildup on the bulbs and water from splashing onto them? or would you say it is generally okay to go without the splash guard? Without the splash guard, TEK light fixtures don't have any kind of protection for the bulbs right?