LED looks to be the best option for at least the next ten to fifteen years because of constantly improving efficacy.
Current lighting technology allows for over 200 lumens per watt and improving but theoretically could get to 683 lumens per watt.
That would allow Horizon LED’s 150w LED fixture to be – theoretically – replaced by a 34 watt LED fixture in time.
OLED (organic LED) uses LED technology but comes in flat (and bendable) sheet.
Used in devices like your cell phone, it has proven to be less valuable for general lighting.
Laser light can be carried by fiber optic tubing then spread with an optical system to distribute in needed areas.
Laser is very expensive at this point but may become a viable general lighting option in the future.