yeah there's some more information about W-LED and RGB LED backlighting here which is useful.
The RGB LED backlighting is very expensive at the moment so if a screen is listed as LED backlit, you should be able to tell straight away from the price. Modern W-LED screens are generally fairly cheap, but RGB LED are still very expensive. manufacturers will almost certainly list RGB LED in their specs and overview on their websites as well. anything else touted as LED without specific mention (And a lower cost) will almost certainly be W-LED
The RGB LED backlighting is very expensive at the moment so if a screen is listed as LED backlit, you should be able to tell straight away from the price. Modern W-LED screens are generally fairly cheap, but RGB LED are still very expensive. manufacturers will almost certainly list RGB LED in their specs and overview on their websites as well. anything else touted as LED without specific mention (And a lower cost) will almost certainly be W-LED