Should I dim 1000w for small space?

Dude that's too much light with not enough space.. Your heat.. Your "Over lighting". You'd be way better off with a 250w or 400w. Contact a bulb supplier and find out from them what they would advise.. But a 1000 watt with 2 feet of height is NO good. Sorry to be the bearer of bad news but the truth is it's not a good idea to substantially dim down any grow light period.. Unless you are having problems. https://eyehortilux.com/grow-lights-grow/to-dim-or-not-to-dim-your-grow-lights-that-is-the-question/