I've just transplanted two clones for my first grow in 4 years, I have them under a 400 watt MH dialed down to the lowest setting, hung about 30" above. Should I turn up the light, lower the light, both, or neither. Thanks.
Turn them up, but raise your lights.
36 inches is usually a good starting point, then lower in increments over days until the plants react positively.
You will find their sweet spot.
Hope this helps.