with a 400 you might be right. You don't want to spread the light too much. A couple of my friends rock all cool tubes. They run 600's and 1000's. The cool tubes with wings work much better than the hoods they had before with their lights. If you vent a cool tube. You want to have speed controller for the fan too. If the bulb cools too much (below operating temp) it can cut around 10% spectral output. Having glass does that too.
I like the hoods that you can have the option of removing glass if wanted during fall/winter. I always have to do a ton of research before buying anything. I'm anal about reflection and don't mind spending the $ if I have to. No point in having good bulbs and not getting the most out of em. I'm going look into cool tubes. Just more research damn it lol.
that's why I switched to vertical bare bulb growing. I grew 8 plants 5 feet tall. With a CMH hanging in the middle. When I get new ones I will be doing it again. Right now they are under 2 borrowed t5's. Within a week or 2 I should have everything back up and running. Like I used too over a month ago.
I'll be checking that out tonight. Thanks bud.
