Strange growth

I have a new setup in a basement/crawl space in an little old house. I’m growing in 2 different tents of 8 square feet each, with a 600 watt eye hortilux hps in each.
Light is plentiful. Soil is roots organics in 7 gallon pots. I have added a CO2 bag for good measure. Temps for the first few weeks were too cold, around 65, but since then have been better in the low 70s.
The bud growth is pathetic and has been slow the whole time, the pics are at nearly 5 weeks flower and the buds are tiny. I’ve been growing for about 12 years and have seen all sorts of things but can’t figure out what is wrong. Light levels are the same as under 1000 watt bulbs considering the smaller foot print for the 600s. I’ve tested with a meter.
I wonder if there is something unhealthy in the air, if the ph is off, I don’t know. Is there some kind of nute lockout? I’ve grown top notch stuff in many environments through the years and have never seen this. The plant tops look like they are heat stretched, but they are most definitely not. Temps have been too cool if anything.
Thoughts?

Have you had any issues with your light schedule? Those odd three fingered leaves remind me of when I accidentally revegged a flowering plant. It has an incredibly strange impact on the structure of buds and leaves, and the plant will take awhile to begin producing bud weight again but only when you've corrected the light schedule.

There was one issue about 2 weeks in to flower I believe, a timer failed and the light stayed on for maybe 8 hours more than it should have. After that, the timer was replaced and has been on point since. Seems like a relatively minor slip up to me, but maybe it happened at a crucial time. I appreciate the input and will watch it closely.
There are 5 different strains in this tent, and 4 of the 5 are pathetic like the ones in the pic. The one solid one, Harlequin, seems bomb proof to many different environmental factors.

too much N aswell with the clawing of leaves.

Looking very well fed. You're good on the N! Whats your water ph?

Ph is generally between 5.5 and 7.0. It’s a good quality soil Mix with dolomite lime for ph buffering, so as long as it’s in the realm it does fine.

The problem was totally the light slip up that occurred about 2 weeks into flower. It had to have occurred at a crucial time hormonally because they never developed large buds. It produced small bud throughout but still yielded well overall. Every crop since then has been on point.

just had a toxicity problem because my ph reader was not calibrated and was watering with 5.0 ph , result i got a nutrient unknow toxicity in all plants that started with the claw like that , problem solved once true water ph was 6.5

I’ll keep an eye on it for sure

Spenkinz said:

Ph is generally between 5.5 and 7.0. It’s a good quality soil Mix with dolomite lime for ph buffering, so as long as it’s in the realm it does fine.

The problem was totally the light slip up that occurred about 2 weeks into flower. It had to have occurred at a crucial time hormonally because they never developed large buds. It produced small bud throughout but still yielded well overall. Every crop since then has been on point.

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I doubt it was the light error.

did you flush the pot when this happened and renute and add back microbes.

What was the feeding regime.