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Two options: 1. 315W CMH bulb boosted to 400W. 2. 400W CMH bulb. Yes.

We ship from USA. Shipping cost is OK. We shipped many orders to Canada. Yes, price is in US dollars. Three benefits: 1. No need to lift and lower lights. 2. Save energy. 3. Shift light color.

Yes. It covers 5x5 at 3.5

Yes. They are quality lights. Thank you!

All of other CMH ballasts utilize constant power technology. We know that P=U*I. After a bulb is used for a long time, the lamp voltage (U) will go up. To keep P constant, the ballast must output less current (I). Finally this process will lead to very small current that is not enough to keep a...

Thank you brother

Is AC needed when you flip to 630W?

4 SunPlix 400W dimmable CMH grow lights are enough.

Here are our CMH 630W DE light and 630W (boost to 700W) dual 315W light. With our ballasts, bulbs can be used much longer than any other CMH brands.

This customer uses a 400W dimmable CMH light in his 4x4 tent, No AC needed, only a tower fan. We have a Facebook group discussing grow lighting, welcome to join: https://www.facebook.com/groups/248519675519386/

When will you turn both bulbs on in this 4x4 tent? My customer uses one in his 4x4 tent.

Attached is a photo from one of our customers in Canada. In his 4x4 tent, he installed one SunPlix 400W dimming CMH fixture which outputs different power: 400W, 350W, 315W, 210W and 150W. He didn't use AC, only a tower fan. His Instagram page: https://www.instagram.com/great_white_bud/

We measured two Philips bulbs (3100K and 4200K) at different power with our 400W dimming low frequency square wave ballast and got these SPD' s. Please see attached files.

All these are SunPlix CMH grow lights. The last one is double ended grow light, you can use 630W DE CMH, 1000W DE HPS/MH bulbs.

Our reflector is designed specifically for 315W CMH bulb so it can nicely cover 4x4. No need to adjust reflector angle.