Another option(and cheaper) is to buy some amber colored tint on eBay, a few pieces of plexiglass at Lowes(they will cut it to your dimensions). Tint the plexi and replace the glass in your LED's with it. The tint will cut down on the glare from white light. Use plexi in case you don't like it, you can switch back in a few minutes. My suggestion is to NOT do a side by side test, the white light will overlap the tinted light and you will not get accurate results. JMO, it works for us...doesn't work for others.
I'll answer your question-NO, your LEDs will not be as bright as standard HPS lights. I run LEDs but I've come to terms with the reality there are brighter lights out there. LEDs have their own advantages though, so for me they fit the bill.
What one you go with is a decision only you can make.
I'm not sure if simply tinting your current lights will make much difference. It's a fairly cheap experiment though.
I'm not sure we are on the same page. I'm talking about changing the two 40 watt chips in my LED lights out with two 40 watt HPS chips. They will both be LED lights and will both be two 40watt chips. Seelight makes these different chips so I assume there is some difference. My question is how much of a difference?
I have a mixture of warm white/extra warm chips although there not seelite brand. The difference is pretty noticeable between the 2 different colors and the more hps colors defiantly work better in the murky water. The only thing I would be worried about is if you ever fish clear water the lights aren't nearly as clear. I was in the same boat as you and I just purchased and did half my lights and was happy with the balance I got out of them.