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Philips Alto Bulb 400 Watt Hps*


In stock (can be backordered)

SKU: 59016 Categories: , Tag:


Philips Alto Bulb 400 Watt Hps

High Pressure Sodium lamp with clear tubular outer bulb, high output and long reliable lifetime. High Pressure Sodium lights produce an orange/red spectrum, that is best for flowering plants. The orange-red light stimulates plant hormones and encourages it to flower. The best way to light your grow room is with a combination of blue and red/orange light, to keep plants compact and flowering happily.This is best done by using a Halide then changing to a Son T style HPS or by using a multi-spectrum lamp. Plant growth (photosynthesis) is not then determined by lux or energy, but by the photons from the blue to red (400-700 nm) part of the spectrum. This is called growth light! For horticulture, natural daylight (global radiation) is in most cases measured in terms of energy (J or W) with a solar meter.This meter is generally positioned on top of the greenhouse. The value of global radiation is important for climate and humidity control in the greenhouse. Extremely high quality sodium bulbs that produce slightly more lumens than standard models and last much longer than the competition.

Performance Data

Ceramalux 400W Mog ED18 CL ALTO –
Base Mogul [Single Contact Mogul Screw] Operating Position universal [Any or Universal (U)] Watts 400W
Mercury (Hg) Content 31 mg
Color Rendering Index 21 Ra8
Color Temperature 2100 K
Initial Lumens 50000 Lm
Design Mean Lumens 45000 Lm
Light Center Length L 5.75 in
Max Overall Length (MOL) – C 9.75 in
Diameter D 2.25 in
Rated Avg. Life 24000 hr


1 Year

Additional information

Weight 0.23 kg
Dimensions 6.60 × 6.60 × 27.94 cm