I upgraded from t12 to t8 immediately, without any damage to buds or peduncles. Then from t8 to retrifitted t8 LED. Same as before, immediate, without adverse effects.

Okay. I think I'm going to do it tomorrow. Part of me wants to leave the old lights up with the new to "acclimate" them but I know it'll be too much light :/

The ones I have now are red/pink blooming lights and the new ones are more blue vegetative/foliage.

May the Hoya Gods allow them to keep on keepin on bloomin!

Are you using shop lights? Before I switched to LED, I used 2 foliage bulbs and 2 blooming ones in the light fixture, like this:

Now, I use the LED lights, and have like 6 of these for supplimental lighting:

These are the lights I have now:

Would it be safe to use all of them, so I'm getting both vegetative growth and stimulation to bloom?

Yep!