See full version: Replacing LU70 High Pressure Sodium Bulb with LED
Also, the color of any LED is so much better than HPS that it will appear to be brighter light. Nonetheless, once you are used to LED, you will be happier aiming for a higher CRI (color rendering index). This is a scale of 0-100.
This is not as simple as screwing in the LED replacement. You will need to pull the light fixture down off the wall/pole. Then you need to open up the fixture and alter the internal wiring so the incoming mains power feeds the mogul socket straight, and the transformer/ballast/ignitor are entirely disconnected. here
LED's have a driver circuit, but it's small, and it's built into screw-in LED "bulbs". more
I have a bunch of older outdoor light fixtures with this bulb in them:
Your HPS (High Pressure Sodium) lamp has a ballast made of a hefty transformer, capacitor and "ignitor circuit". The transformer limits current (at a variety of voltages, settling at 55V) and the ignitor spikes a 3000 volt pulse onto the HPS bulb to initially strike the arc. Needless to say, you don't want to put any other kind of bulb there. here
There are about 5 of these and I'm considering replacing the bulbs with LED replacements. I don't know much about them though. Is it "safe" for me to replace them with a regular outdoor-rated LED lightbulb to save electricity?
For a long time, HPS bulbs were the bulb of choice for many cannabis growers. However, newer technologies like light emitting diodes (LEDs) and ceramic metal halide (CMH) are providing more competition for HPS manufacturers. In an effort to compete, HPS manufacturers now offer double-ended lighting technology, which are more powerful and last longer than their single-ended counterparts.
Unlike metal halide growth lights, high pressure sodium lights have fewer carbon emissions. They also tend to last longer. Most high pressure sodium light systems normally last between 12,000 to 24,000 hours. here
HPS bulbs, along with other types of grow lights such as metal halide (MH) and mercury vapor (MV) are known as high intensity discharge (HID) lights. more
A high pressure sodium (HPS) light is a type of grow light that is commonly used for indoor gardening. This particular light stimulates plant growth by diffusing the portion of the electromagnetic spectrum that is ideal for the whole process of photosynthesis. High pressure sodium lights are also used to prevent the plants from growing overly spindly and long. It mimics general outdoor conditions, especially as far as color and temperature is concerned.
A 400W bulb can easily cover a gardening area of approximately 15 square feet, while a 1000W bulb can be used on a growing area of around 7x7 feet. here
In 1868, Andrei Famintsyn was the first botanist to adopt a high pressure sodium light for indoor gardening. This grow light is commonly favored during the reproductive and vegetative stages of gardening. In these cases, growers may want to adjust the light spectrum range to enhance growth. High pressure sodium bulbs emit light primarily from the yellow to red parts of the visible spectrum.
Additionally, HPS lamps pose a potential fire hazard, especially when you dispose of them. If such a lamp breaks, the exposed sodium metal can result in a fire. more
Indeed, high pressure sodium (HPS) lights are generally unmatched in terms of energy efficiency. However, there is exactly one other type of lighting that beats HPS in that category, and that is Light Emitting Diode (LED). The popularity of that technology is not just due to its energy efficiency. LED lamps produce light of a much higher quality, as opposed to the dim yellow one generated by HPS. Also, LEDs waste less energy producing waste heat, resulting in longer life and the best energy efficiency.
So, to illustrate our point, let’s have a look at our HPS to LED conversion chart. here
Back in the day, more wattage meant more brightness. Nowadays, however, the situation is drastically different. A LED lamp uses 30 watts quite differently from an HPS one. The current unit for measuring brightness is the lumen, which represents the amount of light produced by a bulb or a lamp. here
Thought the photoelectric cell might have gone bad, so I replaced that. more
I have a 150-watt high pressure sodium security light that mysteriously began cycling on and off about a month ago, after about three years of faithful operation.
I suppose my next move will be to try a new bulb, but these things are supposed to last much longer than this one's been in service. here
Do these things have some kind of ballast or starter that might have gone bad? here