cooltubes

how much heat do they actually take away compared to a normal reflector

They take away if it's hooked up to a cooling duct w/ fan. Imagine it as a dual pane glass. It prevents a large amount of radiant heat from transferring freely (as it would without it). That mixed with a fan that blows through the tube and transfers the hot air away will lower the temperature. A normal reflector? I'm unsure of what you mean but if there is no opening in the reflector to allow air flow to cool it, then the metal+air inside the fixture will heat and heat until transferring that to your setup

well atm i got a cool tubeon a seperate fan from my cf but my temps are still high iwas wondering if i put the cfto the fan then to the cooltube then out the tent then used another fan for intake would it lower temps even more or should i run a cf with a normal reflector and a forced intake

cooltubes usually get you twice as close to the plants then with no protection. When your light is 2 times closer, your plants get 4 times more light! (light dissipates exponentially!)

My temps went from low 90s to low 70s with a cool tube. My house is around 65 degrees, and I'm running a 3x3x6 tent with a 600hps and a 450cfm cooltube.