Didn’t see anyone mention these above, but I use both of them and they seem to cause vigorous growth and tight internodes from even 2+ feet away (the spotlight style more so than the tube style):
Both are available in either “balanced/seedlings” or “red/flowering” spectrums, I use a mixture.
They range from ~1.4 to 1.8 umol/j, depending on which color and fixture type you get.