I did the same mod to my gauges and the temp gauge isn't as bright as the others because it has a T1.5 light bulb behind it lighting it up whereas the other gauges all have 168/194 size bulbs. The instructions on the ledautomotive.com website indicate that there are 4 168/194 bulbs on the back of the instrument cluster but mine only has 3 and 1 T1.5 bulb. I don't know if it's different because I have 98 I4 sedan or what. I used the wide angle leds for the gauges because of it's more even light pattern and narrow angle leds for the indicator lights such as blinkers, cruise control, CEL, etc.

 

I actually got lucky on this gauge cover, i hear you on the yellow one they are everywhere man haha but the blue one are so rare that i had to look like crazy and finally went back on ebay. i got this used cause the guy selling this sold his accord. I didn't notice my temp gauge was so dark, i have my gauges like this now....
I'm thinking of trying the red leds whatcha think?

 

Yeah same here i have an I4 sedan as well and there were only 3 bulbs, i was thinking that since that instruction was for a v6 that could have been the case, we have 3 and they have 4 leds you know...