Ushio HiLux Gro CMH 315W 3000K, the warm lamp in the HiLux Gro line
This is the bloom-spectrum 315W ceramic metal halide lamp from Ushio, sold as model CMH-315W/930/AGRO under product number 5002536. It is rated at 33,000 lumens after 100 hours, or 110 lm/W, the higher efficacy of the two HiLux Gro colour points. It is rated at 620 µmol/s of PPF, and colour rendering sits above CRI 90. Rated life is 15,000 hours on ten-hour starts. The lamp runs at 100V and 3.15A, needs a 4 to 5 kV starting pulse, and pulls 4.7A while it warms up. It sits on a PGZX18 base inside a clear, double-envelope T12 bulb that measures 193 mm end to end. It is rated for open or enclosed fixtures, burning anywhere from base-up to horizontal. The ballast match is an ANSI C182/O-rated ballast or an electronic CMH ballast. After a power cut, give it 6 to 8 minutes to cool before it will restrike. That wait is normal for ceramic lamps.
A 315W CMH Bulb for Flowering
At this colour temperature it sits in the bloom and transitional range, warm enough to carry a crop from flip to harvest. Over a 3x3 or 4x4 tent, most growers start it around 18 to 24 inches above the canopy and lower it once the stretch ends. Open reflectors are fine here, because the lamp is rated for open and enclosed fixtures alike. Drive it with a low-frequency CMH ballast, since a standard HPS or MH ballast will not run it. It is a lamp only, so the socket, reflector and ballast all come from elsewhere. For a veg room, the 4200K lamp in the same line is the better call.
Key Features
- 620 µmol/s PPF: The photon figure is the higher of the two HiLux Gro 315W lamps.
- 110 lm/W Efficacy: More light per watt keeps heat and power draw down in a sealed flower room.
- 3000K Bloom Spectrum, CRI >90: Warm output carries flowering while leaf colour stays easy to read.
- 15,000-Hour Rated Life: Long rated life on ten-hour starts means fewer lamp changes per year.
- PGZX18, Open or Enclosed: The standard single-ended 315W base fits common CMH reflectors either way.
Technical Specifications
| Specification | Value |
|---|---|
| Model / Product No. | CMH-315W/930/AGRO / 5002536 |
| Lamp Type | Ceramic metal halide (CMH), single-ended |
| Wattage | 315W |
| Color Temperature | 3000K |
| Growth Phase | Bloom / transitional |
| Lumens @ 100 hrs | 33,000 |
| Efficacy | 110 lm/W |
| PPF | 620 µmol/s |
| CRI (Ra) | >90 |
| Rated Life | 15,000 hours (10-hour starts) |
| Lamp Voltage / Current | 100V / 3.15A |
| Starting Current | 4.7A |
| Min. Open Circuit Voltage | 198V RMS |
| Starting Pulse | 4-5.0 kV peak |
| Ballast | ANSI C182/O or electronic CMH |
| Hot Restart | 6-8 minutes |
| Base / Bulb | PGZX18 / T12 clear, double envelope |
| Maximum Overall Length | 193 mm |
| Burning Position | BU ±90° |
| Luminaire | Open or enclosed |
| Max. Base / Bulb Temperature | 250°C / 350°C |