LZW31-SN - Ramp rate and delay turning light on

Brand new LZW31-SN (this LED bar design makes it the sexiest switch out there for sure).
Just installed and paired with Hubitat C7.

I tap to turn on the light and there is this big delay of over one second until the light starts to ramp up.

Press the “On” button in Hubitat: same thing.
Set parameter “Disable Physical On/Off Delay” to yes, no difference.
Set “Disable Physical On/Off Delay” back to no, unpaired the switch and got the same thing (and this time it is not associated to a hub).

I noticed one thing: I tap to turn it off and it starts to fade much faster (around half a sec).

I start over, this time I set parameter 1 to 0.
On/off from hubitat is almost real time.
Physical on/off is a lot faster, a little over half a second.

I set parameter 1 to “0”.
I still get a fade in effect and the delay is now a little over half a second.

What are my options to reduce delay to as minimun as possible? Do you believe the light bulbs also contribute to the delay - they are LED so it make sense they only start to respond after a certain voltage is applied?

Is this something firmware related? Current on 1.48.
Trying to get as close as possible to what we are use to: a “feel good fade in effect” and a response time not over half a second.

I’d recommend setting a minimum dim setting so that it’s closer to the percentage to bulb turns on. E.g. I set mine to 35% as a new minimum because my lights didn’t always turn on at anything less than 30%. Since it starts at 35%, the dimmer doesn’t have to ramp from zero anymore.

What @harjms said. The way to find your true minimum is to set the min and max to 1 and 99, THEN start the dimming process to find the minimum. Once you set the minimum, that value becomes the new 1%.

Thanks guys. I was able to determine these bulbs start kicking in at 24% so I set the minimum to 23%. I’m guessing this is the correct parameter:

image

It did improved the response by something in between 100 and 200 ms.
Hard to get an acurate measrument for something this fast but… it was an improvement for sure.

Question: Because 23% is he new minimun, does it mean it is always send 23% power even when it is off or, is it cutting down to 0 and starting at 23 when I turn it on?

Basically 23% is your new zero.

Good to know :+1:

Almost 4AM and I’m here having fun with this stuff.
I upgraded firmware to 1.52-beta.

I’m not sure if something else changed, if it is a concidence or… if there are performance improvements in the new firmware but the thing is super fast now.
Better than I ever expected it could be.

My minimums are set a few percent above where the turns on and the bulbs still turn off. So it’s definitely not still putting out the minimum. There could be a little leak because of the design of the dimmer, but definitely not what the minimum is set to.

23% is actually the new 1%, just to be insanely picky.

0% would still be “off”.

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:unamused: 23% would be your new baseline of 1%, correct.

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Make sense. Thanks a lot.