---
product_id: 28778928
title: "400 Watt WELTHINK MH/HPS Ultra Quiet Fanless Aluminum Heat Sink Digital Ballast, High Intensity Discharge, for Hydroponics Grow Light"
brand: "welthink"
price: "FREE"
currency: EUR
in_stock: false
reviews_count: 2
category: "BISS"
url: https://www.desertcart.com.cy/products/28778928-400-watt-welthink-mh-hps-ultra-quiet-fanless-aluminum-heat
store_origin: CY
region: Cyprus
---

# 400 Watt WELTHINK MH/HPS Ultra Quiet Fanless Aluminum Heat Sink Digital Ballast, High Intensity Discharge, for Hydroponics Grow Light

**Brand:** welthink
**Price:** FREE
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** 400 Watt WELTHINK MH/HPS Ultra Quiet Fanless Aluminum Heat Sink Digital Ballast, High Intensity Discharge, for Hydroponics Grow Light by welthink
- **How much does it cost?** FREE with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/28778928-400-watt-welthink-mh-hps-ultra-quiet-fanless-aluminum-heat)

## Best For

- welthink enthusiasts

## Why This Product

- Trusted welthink brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

ULTRA HIGH QUALITY Digital Ballast for powering Metal Halide and High Pressure Sodium grow light bulbs

## Images

![400 Watt WELTHINK MH/HPS Ultra Quiet Fanless Aluminum Heat Sink Digital Ballast, High Intensity Discharge, for Hydroponics Grow Light - Image 1](https://m.media-amazon.com/images/I/41VXn6R0kGL.jpg)

## Customer Reviews

### ⭐ 







  
  
    Didn't work as arrived
  

*by D***N on Reviewed in the United States on March 4, 2014*

The unity did not work as arrived and burned out the bulb so It also had to be replaced. The mfg was contacted, but only offered return authorization with no replacement nor pre-pay for the return. Based upon my experience, I would not recommend the unit nor the company selling the unit.DennyDallas, TXUpdate: I had received several phone calls from a "Canton Trading Company" as per caller ID. These were at awkward times for me around dinner time while I'm cooking or when I was not there, so the phone was not picked up. No messages were ever left on my voicemail, usually indicating a telemarketer. The phone rang about 12:00 pm today, caller ID said; "Canton Trading Company" so I picked it up with expectations that it was a telemarketing company and my intention was requesting to be removed from their telemarketing list. Turns out Canton Trading Company is the person/company selling these units. The bottom line....... he basically was upset that I had posted the problems experienced. He indicated that I should have called to request customer service. OK.. You plug it in, it doesn't work. You plug in in to a completely different fixture and bulb, it doesn't work. I get it, it doesn't work. Two e-mails were also sent out protesting me paying the return postage and the lack of offer for replacement. Neither e-mails were returned. Three weeks later and $23.00 poorer from the return postage, received an e-mail offering replacement or credit. If this had been stated in the beginning, my e-mails returned, there would have been no negative review. Life is not perfect, they just sell the unit and I fully understand that. However the communication is just plain bonkers. Strange deal!! There is an old saying in Sales: We all talk ourselves out of more than we talk ourselves into. They did.DennyDallas, TX

### ⭐⭐⭐⭐⭐ 







  
  
    Top of the line Ballast
  

*by J***T on Reviewed in the United States on October 19, 2014*

I used this unit for a year. Never had any problems. Very well constructed. Quiet. Overall very happy with my purchase..

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**Shop now:** [https://www.desertcart.com.cy/products/28778928-400-watt-welthink-mh-hps-ultra-quiet-fanless-aluminum-heat](https://www.desertcart.com.cy/products/28778928-400-watt-welthink-mh-hps-ultra-quiet-fanless-aluminum-heat)

---

*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-03-09*