Old = turn on/off, consistent, proven by time and full spectrum from uv to ir, specially on mh
Led = controllable, you get the itch to change it constantly and less spectrum, still work well if you set and forget.
But if you could replicate with led the exact same spectrum, intensity and coverage of let's say a 250w 14k phoenix you would have the same exact growth and color as4 the phoenix. LED's can work really well but companies keep not using uv, ir and growth LED's on the fixtures because they are cutting costs on 400+ lights.
Led = controllable, you get the itch to change it constantly and less spectrum, still work well if you set and forget.
But if you could replicate with led the exact same spectrum, intensity and coverage of let's say a 250w 14k phoenix you would have the same exact growth and color as4 the phoenix. LED's can work really well but companies keep not using uv, ir and growth LED's on the fixtures because they are cutting costs on 400+ lights.